Tampilkan postingan dengan label CALL. Tampilkan semua postingan
Tampilkan postingan dengan label CALL. Tampilkan semua postingan

Kamis, 01 Desember 2011

Linguistics and the Teaching of English as a Second/Foreign Language

CALL Mini-Course
Unit 1: Introduction to Computer-Assisted Language Learning.
WHAT IS CALL?
In general CALL can refer to any language learning or teaching that involves the computer in a significant way. CALL can be
* one student on one computer with interactive software
* two or three students on one computer with interactive software
* students on computers interacting with other students (computer-mediated communication)
* students on computers working with web-based language content
* students interacting with one another and a teacher through a computer (online class)
* a teacher using a single computer and large monitor or data projector for class instruction
* and other options

CALL environments can be a classroom, a computer lab with the teacher present, a computer lab with students working independently, or students working at a public computer, at home, or elsewhere. The microcomputer has been a central element of this for the past few decades, although notebook computers, PDAs, and even cell phones are beginning to be utilized.
Computers in language teaching: tutor vs. tool. The field of CALL is split more or less into two camps: those who see the computer as a machine for delivering interactive language learning and practice material–the computer as tutor–and those who see it as a means for learners to experience the authentic language and communication opportunities and enhancements afforded by computers–the computer as tool (Levy 1997). It is of course possible, I would say preferable, to recognize these not as opposing philosophies but as end points along the same language teaching continuum that balances teacher-fronted and group work in a classroom. In other words, effective language learning can include elements of both. Consequently, in this introduction to the field I will try to strike a balance between them so that you come out of this able to recognize the potential advantages of using neither, one, or both for a given teaching situation.
Acronyms and attitudes. This field has gone by a number of different names as groups of practitioners have attempted to impose their own philosophies. CALL remains the generic term
* CALL: Computer-assisted language learning (the generic term); sometimes Computer-aided language learning
* CALI: Computer-assisted language instruction (more teaching oriented; less learner focused)
* CBLT: Computer-based language training (views elements of language learning as “training”)
* CELL: Computer-enhanced language learning (computer’s role is less central)
* TELL: Technology-enhanced language learning (accommodates more than just computers)
* ICTinLT: Information and Communication Technologies in Language Teaching (focuses more on tool use)
* NBLT: Network-Based Language Teaching. (focuses on computer-mediated communication and the web

A THUMBNAIL SKETCH OF CALL HISTORY
CALL began in the 1960s with mainframe-based drills, especially those based on the University of Illinois’ PLATO system. It remained an insignificant alternative for language learning until the spread of the microcomputer into educational settings in the early 1980s. Early programs were written by teacher-developers on Apple II, IBM PC, and BBC computers, and were often distributed for free. Commercial programs, when available, were usually quite expensive but were generally more stable and technically sophisticated (though not as innovative). There was some work done with interactive laser disks during this time which provided the foundations for multimedia.
In the late 1980s and early 90s, the Apple Macintosh replace the Apple II in many educational settings and became a favorite among teacher-developers because of the support of HyperCard, a powerful but easy-to-use authoring program. The Mac had built-in sound, making it easier to work with than PCs which had incompatible proprietary boards competing with one another. Early Macs (and HyperCard) did not support color, however, so commercial programs continued to appear for PCs. The PC market was also dominant in most countries outside the US because the machines could be obtained much more cheaply than Macs.
During this period, the use of the computer as a tool increased as teachers developed innovative techniques for using email and word processors became integrated into writing classes. Some teachers helped students develop their own HyperCard projects or ones in similar applications developed for the PC, such as ToolBook. It was noted that building collaborative projects around the computer and using computer mediated communication (CMC) had a strong effect on some students’ motivations and seemed to make it easier for shy students to become involved. Some teachers built assignments around student interactions in multi-user domains (MUDs), the precursors of today’s chat rooms.
Two major changes came starting in the mid-1990s. One was the dramatic increase in commercial multimedia for language learning as CD-ROMs became standard in home computers. The other was the development of the world wide web. Because of the web and increased access to the Internet in general, the past five or six years have seen a major shift toward tool uses, and many newcomers to CALL define the field almost entirely in those terms.
TEACHER ROLES
Teachers interested in CALL can get involved in a number of different ways. Here are some possibilities.
* As researchers: into second language acquisition, human-computer interaction, what works for CALL
* As consumers of CALL software for class use or building web activities into course work
* As directors, helping students find and use supplementary CALL materials or web resources
* As managers of computer-mediated communication among learners in and out of class
* As software or web developers, either “from scratch” or adding new materials to existing templates
* As coaches to help students develop software, websites, and general computer literacy
* As CALL experts for your program, helping other teachers and administrators with CALL implementations
* As CALL professionals, consulting on external projects, doing software reviews for journals, making conference presentations, writing papers, interpreting and applying CALL research, and/or providing input to the field at large.

Selasa, 29 November 2011

Grammar Frameworks In Intelligent CALL

Clive Matthews,

University of East Anglia, Norwich, England


Abstract:
Most recent work in ICALL has tended to focus on syntactic structure. Clearly the grammar formalism chosen for such systems is of some importance. However, as this paper argues, little consideration seems to have been paid to such matters beyond the question of computational efficiency. Following previous work, the paper further argues for choosing a formalism that potentially meshes with work in SLA. Of all the main grammar formalisms being developed, GB theory, with its emphasis on Universal Grammar, has had the most impact on SLA research. Recent advances in "principle based" parsing now make possible the integration of such work into ICALL.


INTRODUCTION
The theme of this conference is "bridges.' Bridges help to reduce the boundaries between disciplines and this is something I have been recently advocating as necessary with reference to Intelligent CALL (ICALL) (Matthews, 1992a). It is a topic that I want to pursue in a little more detail in this paper. The connections I most want to explore are three-fold: between linguistic theory and ICALL, between Second Language Acquisition theory (SLA) and ICALL and, finally, between linguistic theory and SLA (Figure 1).
0x01 graphic
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The claim is that the link-, between these disciplines allow each to inform the other, so that findings and advances in one area will provide insights and gains in the others. It is only in this way that we can hope to enhance the effectiveness of CALL (intelligent or otherwise). Unfortunately, the indicated ties frequently exist more in theory than practice; this is why the lines have been dotted in the diagram. As becomes apparent later, these often weak dependencies will only allow a few tentative conclusions in the overall thrust of our argument.
We start by justifying the connections. ICALL can be roughly characterized as the attempt to use techniques from Artificial Intelligence (Al) within CALL. The claim is that the resulting systems will have the ability to respond flexibly to the users of the software so that not only will they be able to handle any input-including, crucially, the unexpected — they will also be able to tailor their interactions to the individual.
The obvious Al research areas from which ICALL should be able to draw the most insight are Natural Language Processing (NLP) and Intelligent Tutoring Systems (ITS). Indeed, it is usual to conceive of an ICALL system in terms of the classical ITS architecture pictured below.
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The Expert module contains the knowledge that is to be tutored, the Student module consists of a model of what the student knows regarding that domain (plus any other relevant details such as learning preferences) and the Tutor module determines what should be taught and how.
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In this paper, our interest is in characterizing the Expert module and, in particular, an Expert module concerned with grammatical form.1 Consequently, it is the NLP side of ICALL that is most relevant to our cause rather than the peculiar ITS concerns of student modeling and tutoring strategies.
It is for this reason that we have drawn the link between ICALL and linguistic theory in the diagram since it would seem to be a truism that NLP will have close links with linguistic theory. That is, one would expect linguists to develop particular grammar frameworks (GFs) and descriptions of various languages using these GFs which the computational linguist then simply implements. However, this is a relationship that is sometimes more honored in the breach than in the observance; hence, the dotted line in the diagram. Usually the problem is that linguists do not work within a sufficiently precise formal framework as required for a computational implementation. This, however, is becoming less so and we will adopt the assumption that, since our ICALL system is going to need a GF in which to couch its grammatical descriptions, linguistic theory is a reasonable place to start the search.
Turning to the link between ICALL and SLA, I have argued previously that there is a stronger commitment to "going AI" than simply the importation of a set of clever programming techniques into CALL (Matthews, 1992a). That is, the majority view of Al sees it as an attempt to understand the (psychological) mechanisms underlying human intelligent behavior. To assess its achievements in this undertaking, AI must ally itself to those other disciplines which take human intelligence as the focus of their enquiry. These fields range, amongst others, from philosophy and linguistics to (cognitive) psychology and anthropology via visual perception and neuroscience. In brief, this "cognitive science" view of ICALI, requires that it be informed by theories of psychology and, in particular, theories of SLA. As we shall have cause to remark later, there are various shortcomings in much SLA research which precludes such a beneficial relationship- again, this is why the line is dotted. However, that work which is relevant in SLA should provide a keen stimulus to ICALL.
The final connection, between linguistic theory and SLA, is based upon the (sometimes controversial) assumption that SLA, just like NLP, should be informed by linguistic theory. Of course, we are not claiming that linguistic theory will account for the full range of facts that constitute SLA; clearly, other social and psychological factors are involved. However, linguistic theory does play the crucial r6le of being able to describe
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(within this limited domain) what is acquired and, given a suitably articulated theory, some indications as to how this might be achieved.
It is this complex network of connections and concerns that makes ICALL such a potentially rich area of study. As Alan Bailin notes:
[ICALL is] part of an important endeavor. [It] constitute[s] an experimental scientific investigation of [second] language teaching and learning... [which]...explicitly or implicitly make[s] general claims about the components of language teaching and learning. [Bailin, 1991]
Note that this passage clearly (and correctly) implies that bridges provide access between disciplines from both directions.
The underlying assumption of much of the above is that the only direction of influence within this net is all towards ICALL. However, we have also suggested that this effect, in many cases, is rather weak But, once the connections have been noted and the nature of the bridges, it becomes quite possible to look for the influence also flowing in the other direction. Indeed, it should be expected.
What GF would one choose to characterize the (grammatical) Expert domain of an ICALL system? Here our main interest is in discussing some of the criteria that should be applied in making this decision. As this section has suggested, at least some of these criteria should revolve around considerations having to do with linguistic and SLA theory.
In order to be able to make the discussion more concrete, we will compare and contrast two frameworks, Definite Clause Grammars (DCGS: Pereira and Warren, 1980) and the current version of Chomsky's transformational grammar known either as Government and Binding (GB) theory Or, increasingly, Principles and Parameters Theory (PPT: Chomsky, 1986). These GFs have, in part, been chosen because of their very different approaches to characterizing a language. It turns out that these differences also have interesting computational properties.
It is probably not an exaggeration to say that DCGs (and closely related frameworks) are currently the favored GF in ICALL. PPT, to the best of my knowledge, has not so far been used in ICALL.2 The burden of this paper is to argue that, all things considered, there are considerable arguments in favor of adopting PPT as a GF for ICALL.
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CRITERIA OF ADEQUACY
It may prove useful to start with a brief survey of (some of) the main GFs that have so far been utilized in ICALL:
(1) Various Augmented Phrase Structure frameworks (including DCGS) as used, for example, by Chen and Barry (1989), Schwind (1990), Labrie and Singh (1991), and Sanders (1991). Also included are systems embedded under PATR-114ike environments such as Levin, et al. (1991) and Chanier, et al. (1992).
(2) Augmented Transitions Networks (ATNS) used by Weischedel, et al. (1978). Handke (1992) uses a Cascaded ATN variant.
(3) Lexical Functional Grammar (LFG) used by Feuerman, et al. (1987).
(4) Systemic Grammar used by Fum, et al. (1992).
(5) Tree Adjoining Grammar (TAG) used by Abeillé (1992).
(6) Incremental Procedural Grammar (IPG) used by Pijls, et al. (1987).
(7) Word Grammar used by Zähner (1991).
(8) Preference Semantics used by Wilks and Farwell (1992).3
Even the above list does not include some of the frameworks enjoying considerable support in recent linguistic theory; for instance, Categorical Grammar, Generalized Phrase Structure Grammar (GPSG), and Head-driven Phrase Structure Grammar (HPSG) to mention just a few.
What criteria should be applied when deciding on a GF for ICALL?4 Amongst a number that come to mind, we choose to highlight the following:
Computational effectiveness
Since the GF is to be incorporated within a computer system, it should be capable of an efficient computational implementation. This imposes various conditions.
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For example, the GF should be associated with a grammar formalism in which the framework is to be formulated. It is usually assumed that this formalism, itself, should have a clear syntax and semantics so that we know whether we have accurately expressed the relevant parts of the GF (Pereira and Shieber, 1984). This has shown to be the case with the formalism used for DCGs but has frequently been doubted with respect to the notation used within PPT. It is certainly true that there is a plethora of different notational forms used in expressing PPT within the linguistic literature. However, recent interest in principle-based parsers has had to address this problem and more precise formalisms are now being used — for example, Ed Stabler has formulated the whole of Chomsky's (1986a) 13arriers framework using First Order Logic (Stabler, 1992).
A second computational requirement is that the GF be associated with well-defined and efficient parsing algorithms. Here, until recently, DCGs held the advantage over transformationally-based grammars. The reason is that the DCG formalism can be run almost directly as Prolog code. Given that there are now efficient Prolog compilers, DCGs can be compiled into impressively fast parsers. Equally, DCGs may also be associated with a whole range of different parsing strategies apart from the top-down, depth first, left-to-right strategy that "comes for free" when running the grammar directly as a Prolog program.
The early history of transformational parsing, on the other hand, is not so impressive. Although various systems were developed in the mid 1960's based upon the early versions Of transformational grammar, these tended to be highly inefficient due to their highly non-deterministic procedures and produced a large number of spurious analyses before finally finding a genuine candidate. Indeed, it is often reported that the MITRE system (Zwicky, et al., 1965) took 36 minutes to analyze an 11 word sentence. Matters have greatly improve d since then. For example, Marcus's PARSIFAL parser was the first of a new generation Of transformationally-based systems (Marcus, 1980). Adopting a deterministic procedure — via lookahead — PARSIFAL was respectably efficient. More recent systems based upon PPT perform with even greater efficiency and will be discussed in more detail below.
Accordingly, it is rather difficult to choose between our two exemplar GFs based on the criteria of this section. We return to other aspects of this question in the section "Rule- vs. Principle-based Parsing."
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Linguistic perspicuity
GFs play two main roles within our disciplines. Their first, and most important, contribution is descriptive; they provide the tools with which to analyze the grammatical structures of language.
However, different GFs (and formalisms) tend to focus on or highlight different sets of linguistic phenomena and the decision to choose one framework over another might be made because one rather than the other facilitates the description of a particular phenomenon that we deem to be important.
As an example of this point consider the following. When introducing DCGs the first exemplar rule is often something like:
s -- > np(Num), vp(Num).
The focus of attention here is on how this rule (in combination with others) determines subject-verb agreement. That is, the term Num is a variable which is intended to stand for the number of an item. Because the same variable is used with both np and vp, the rule ensures that the value — whatever it is; singular or plural — of the subject NP is the same as that of the verb which heads the VP.
Such agreement properties are easy to express in DCGS. It is no accident, then, that those researchers who have chosen DCGS, and their like, as their ICALL GF tend to focus on agreement facts within the language.
Now compare the DCG account of subject-verb agreement with that in PPT. This involves the mysterious "Rule R" which associates agreement features generated under the 1-node with the (lexical) verb at the level of PF. This (morphological) rule will determine that, say, like + singular is realized as likes. The I-node is also co-indexed with the subject NP as part of specifier-head agreement. Accordingly, both NP and verb get associated with the same agreement features although via different mechanisms.
As this description makes clear, subject-verb agreement receives a more complex analysis within PPT when compared with a DCG. Accordingly, if all one were interested in was agreement properties of a language then a DCG would, ceteris paribus, be the obvious choice of GF. Of course, the overall decision is unlikely to be based upon such a simple example and there are other areas where DCGs are not so perspicuous and where PPT has an advantage. In the long term, choosing a GF is a matter Of trading
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disadvantages against advantages with respect to the particular features that interest the researcher.
Little consideration seems to have been paid to the question of the descriptive adequacy of the various GFs within SLA. In part, this is due to the already remarked upon weak links that tend to bind SLA theory to linguistic theory. Surveying the literature, by far the most consistent adherence has been to the various species of transformational grammar including PPT. However, even when some version of PPT is adopted, the reason has more often to do with concerns relating to the acquisitional claims associated with PPT — notably questions to do with innateness — than with the descriptive adequacy of the framework.
ICALL cannot neglect such issues. Unfortunately, the impression is that many researchers adopt a framework such as a DCG simply because it is an easily implementable theory and then shoe-horn their analyses into the required form. Hence the emphasis on different types of agreement error, even though this does not seem to loom large in discussions of student errors within SLA. We might make two comments on this situation. First that even if SLA cannot always supply particular GF-solutions to the questions of ICALL, it can help to constrain particular GF-answers developed solely within ICALL. Second, here is a dear area where the general informational flow is quite likely to be from ICALL towards SLA.
Acquisitional perspicuity
Besides the descriptive role of GFs, their other contribution is explanatory; they aim to provide justifications regarding actual linguistic acquisition and development. Surprisingly, however, the influence of linguistic theory on both First Language Acquisition (FLA) as well as SLA has been Surprisingly small. There was a flurry of activity for about a decade starting in the mid 1960's which was heavily influenced by the then major (indeed, probably only) GF, transformational grammar. Soon after this pioneering work, disenchantment set in amongst both FLA and SLA researchers with linguistic theory so that for the next decade little acquisitions] work was informed by theoretical syntax. In the last few years, however, there has been a resurgence of interest in some of the new GFs. Pre-eminent amongst these has been the new incarnation of transformational grammar, PPT. There is now quite a large and rapidly expanding body of interesting work using PPT within FLA (see Atkinson, 1992, for a detailed survey) and SLA (see White, 1989, for an overview).
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There are two aspects to the influence of PPT on such research. The first is acquisitional. Here the main claim is that FLA is mediated by innate Structures. It is the question of whether such mechanisms are still available to the second language learner which has most exercised the SLA community. The second aspect is developmental with a number of researchers beginning to use the PPT framework to account for actual maturational sequences observed in FLA (see, for example, Hyams, 1986, and Radford, 1990). This has not been investigated with the same vigor within SLA (although see du Plessis, et al. [1987] for some suggestive work relating to German).
Accounting for developmental sequences may well be an important consideration as far as the student and tutoring modules are concerned in the rest of the ICALL architecture.5 Again, we might make the same observation as at the end of the last section and note that the informational flow is quite likely to be from ICALL to SLA theory.
It might be thought that, given the drift of the last few pages, we are now in a position of being able to justify the already stated conclusion of this paper, namely that there are Strong reasons for using PPT as a GF for ICALL. However, we adopt a far more tentative position. Certainly, given a commitment to bridges as argued for and given the state Of Current research, there are strong reasons why PPT should be accorded careful consideration as a GF for ICALL. However this conclusion is drawn almost by default; other GFs just have not been applied with the same vigor. Adopting PPT on such grounds, then, would be premature.
The choice, therefore, between DCGs and PPT is not that clear when considering the second and third criteria above. However, there are some interesting factors which emerge when reconsidering the two GFs from the computational aspect. The arguments to follow are presented in terms of the properties of rule-base d vs. principle-based grammars. A DCG is an example of the former and PPT, as the name suggests, of the latter. Before turning to these arguments we first need to distinguish between the two types of framework.
RULE- VS. PRINCIPLE-BASED FRAMEWORKS
It is easiest to see the distinction between the two types of approach by thinking in terms of particular grammatical constructions. Usually, the comparison involves constructions such as active and passives. However, the same properties can be seen by considering something as simple as VP structure.
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Rule-based frameworks work by defining specific rules for specific constructions; in our case this means a separate VP rule. A principle-based approach, on the other hand, sees a particular construction as resulting from the interaction of a number of simple, but relatively abstract, syntactic principles. As such, there is no one principle which solely defines the various properties of a VP. Diagrammatically we have:
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We now flesh out this abstract description a little. Consider how a VP such as the bracketed example below would be described in the two approaches:
The Danes [like Maastricht]
With a DCG the basic structure would be handled by the simple rule:
vp --> v, np.
which induces the following tree (with relevant lexical items):
0x01 graphic
As we see, one rule, one structure. The description of the same structure in terms of a principle-based theory, initially, looks far more complicated. Here we need to describe some of the modules and their principles that make up PPT.
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First, X-bar theory. This can be thought of as describing the basic tree structures that are allowed in natural languages. Roughly it says that trees take the form head-argument or argument-head (assuming there to be an argument). For example, this module will license, amongst many others, the following (simplified) trees:
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The first tree is an example where the verb (the head) does not take any arguments. The other two trees represent possible structures where the verb takes a single NP argument to the right or left respectively.
The part of the theory which determines whether a verb appears with an argument or not is known as Theta theory (-theory). -theory relates to questions of who did what to whom. So, a verb such as like involves someone doing the liking and something being liked. These are the -roles of the verb. The main principle of -theory, the  Criterion, (partially) states that each -role should be associated with a syntactic argument (which in this case means an NP). That is why an NP must appear in the VP headed by like in order to receive the verb's (internal)  -role.
-theory, however, does not determine that the NP must follow the verb.6 This is accounted for in terms of Case theory. The main principle of Case theory states that all overt (i.e. pronounced) NPs must be assigned Case by a Case assignor (either Tense, V or P). Case is assigned under government — the assignor must govern the assignee — but it is also assumed that the assignment is directional. In particular, English is a language where the verb's Case is assigned rightwards. Accordingly, the only permissible tree which satisfies all the principles is that shown in Figure 4.
The other tree allowed by the combination of X-bar and -theory is ruled out by Case theory since the NP, which requires Case in order to escape the Case Filter, is in the wrong position to be assigned Case.
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This might seem like great deal of intellectual baggage to account for a simple construction — especially when compared with the DCG account — and would be so if it were not for the fact that the same principles are used to account for other constructions. Consider, for example, the complex NP:
The enemy's destruction of the city
With a DCG this will require the addition of a new rule, say:
np --> np_poss, n, pp.
With PPT there is no need for additional machinery. The X-bar theory will determine the various possible tree structures for this string. This will be much as before except that "NP" will replace "VP." -theory determines that because destruction has two -roles to assign — just like the associated verb destroy — two NPs are required. Finally, Case theory requires these NPs are to be assigned Case. Since nouns are not Case assignors, we account for the presence of the Case assigning possessive's' and the preposition of. What looks like a cumbersome theory when considering a single structure starts to take on a more compact aspect when its coverage is expanded.
RULE- VS. PRINCIPLE-BASED PARSING7
The examples in the last section give some idea of the difference in approach between the two types of theory. We now turn to some of their computational consequences when implemented as parsers. We choose to examine those that have especial significance for ICALL.
Grammar Size
Rule-based frameworks require a large number of rules to describe a language. This is not usually apparent when looking at prototype systems since they only cover a highly restricted portion of the language. However, those systems with a wide syntactic coverage of English use literally hundreds if not thousands of rules. Matters are even worse for languages such as Japanese with a freer word order than English. In such languages the same basic construction may require a number of different rules to describe each of the various permissible permutations due to the variable word Order. This significantly increases the size of the rule set.
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There is an obvious consequence for ICALL. As has been frequently pointed out, various learner errors appear to be due to transfer from the native language. One approach to handling such interference errors is by parsing the informed input with a combination of both the native and target language grammars (see Schuster, 1986, for an example within a highly restricted domain). But if this entails a complete system having a full grammar for, say, Japanese as well as English, the rule base will be astronomical in size.
Clearly, just discovering and writing such a large number of rules is problematic. However, there is also a computational problem since the parsing algorithms associated with rule-based systems run as a function of grammar size; the larger the grammar, the slower the performance.8 The consequence is that as grammars become more complete they will become less efficient when incorporated as parsers.
Solutions to this problem might be found with specially devised algorithms or dedicated hardware. Alternatively, one could move towards a principle-based system where the many different combinations of the same set of a dozen or so principles (with parametric variation) can encode the same information as many thousands of rules. Of course, here there is a promissory note that there are efficient parsing algorithms which can make use of such a grammar.
Grammar Specificity
Not only are rule-based frameworks construction specific, they are also language specific. Each grammar is tailored to describe a specific language and, because of their nature, does not Provide any easy way of stating connections between languages. Take as a simple example the different Word order of English and Japanese. As we have already seen, English complements follow the verb; however, in Japanese they precede it:
gave a book to Shunsuke
Shunsuke ni hon o age-ta
Shunsuke book give-past
For rule-based grammars such differences have to be accounted for by stating separate rules which are rather different in form:
English: vp -- > v, np, pp.
Japanese: vp -- > np, np, v.
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Clearly, on such an analysis it is hard to capture the fact that these two rules are actually describing the same construction in the two languages. The root of the problem here is the rule-based approach's emphasis on defining string sets. Because the English and Japanese strings — lexical items aside — are very different, so are the rules.
Principle-based theories, on the other hand, try to abstract out a set of deeper and more explanatory (universal) principles which underlie such constructions. The same principles apply in all languages. It is the notion of parametric variation which accounts for the differences between languages. In the example under consideration, the assumption is that the relevant module is Case theory. We have already noted that the Case Filter requires that all lexical NPs must have Case. This principle applies to both English and Japanese. The difference lies in how Case is assigned within the two languages. Here the crucial factor is the direction of the assignment. The assumption is that in English, Case is assigned to the right — this is why NP complements follow the verb in order to pass the Case Filter. In Japanese, Case-assignment is to the left so NP complements must precede the verb.
The idea, then, is to describe cross-linguistic variation in terms of a set of common principles but associated with parametric variation. Rather than write a completely new grammar for each language, as the rule-based approach has to, a principle-based parser simply has to determine the particular parameter settings for each language (plus its lexicon). The result is that languages are seen as related rather than unconnected objects. Clearly, as far as ICALL is concerned this is a preferable conclusion to the position that no languages have anything in common apart from being the result of string concatenation. It opens up, for example, the possibility of being able to give principled accounts of language transfer.
Ungrammaticality
Any natural NLP system will encounter ill-formed input from time to time and a robust system should be able to handle such cases. The main differences with ICALL are that (a) ill-formed examples are likely to be more common because of the nature of the users, (b) certain recovery strategies such as asking the user to try again are unlikely to result in any improvement, (c) the ill-formedness is likely to be of a higher degree and (d) some pedagogic response will, on occasion, be required.
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Parsing ill-formed input is problematic for a rule-based system. This relates back to the previously noted emphasis within such approaches on the description of a distinguished string set defined over the words of the language. Once this set of well-formed strings — i.e. sentences — has been defined the job of the theory is over. Accordingly, ill-formed strings are "beyond the pale" of the theory and to handle them within a parser utilizing such a theory requires some additional machinery.
A standard solution to this problem is to introduce more rules designed specifically to handle ill-formedness. This is a familiar approach in ICALL. Of course, it has the drawback of increasing the size of the rule set with the attendant efficiency problems noted in the first section. It is also a problematic exercise in writing enough rules to handle all possible ill-formed input. Finally, there is also the problem in that simply producing a rule to allow through an HI-formed example does not provide an explanation for that failure.
An alternative way of handling ill-formed input in a rule-based approach is by constraint relaxation. Take subject-verb agreement. Suppose a sentence fails to satisfy the well-formedness constraint that both the subject NP and verb heading the VP agree in number. The designer of the parser may specify that this particular constraint may be relaxed (with a record of the error being made). This was what the "failable" predicates of Weischedel, et al.'s (1978) German tutor were meant to achieve. Which predicates were to count as "failable" was left entirely at the discretion of the designer and, as such, provided no principled theory as to why certain predicates were failable and others not.
Constraint relaxation approximates a principle-based parsing approach but on a less systematic footing. If the emphasis in rule-based approaches is on defining string sets, the emphasis within PPT is on defining the underlying abstract principles which underpin the language. As such, any string may be considered with an eye as to how many of these principles (and which) it satisfies. Theoretically it does not matter whether all the principles are satisfied since the emphasis is not on sentences per se but on the principles. Of course, we can define a sentence as a string that satisfies all the principles but this is a derivative notion. In terms of ungrammaticality, the more principles that a string violates, the more ill-formed it is. But even if a string fails a number of principles at least some structure will be assigned. So, taking the ill-formed string:
John a book to the librarian gave
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A parser will, at least, be able to assign it an X-bar structure. The problem has to do with Case theory and the already mentioned direction of Case assignment; since it is rightwards, the NP does not get assigned Case in violation of the Case Filter. Of course, it is quite easy to recover from this violation simply be assuming the alternative parameter setting of Case assignment being to the left.
Other principle violations can lead to far greater problems. This is, in part, due to the links between the various modules of the theory. For example, Case theory is defined relative to X-bar structure (the relevant structural notion being that of government). Accordingly, if a string cannot be assigned an X-bar structure there will also be Case theory violations. This would account for the extreme ungrammaticality of "word salad' strings such as:
the a to book librarian gave John
Such relationships between the modules of the theory also provide, in principle, a theory as to why certain violations seem to result in greater processing difficulties than others.
CURRENT IMPLEMENTATIONS OF PRINCIPLE-BASED PARSERS
This nexus of considerations indicates the potential of principle-based parsing for ICALL. Of course, they are of little worth if workable parsers cannot be developed.
Work has been proceeding for some time on implementing principle-based parsers. Wehrli's work on the parsing of French is an early example (Wehrli, 1983). In addition, a certain amount of research has attempted to combine insights from PPT within the Logic Grammar paradigm (see, for example, Stabler, 1987). There is even some work on Connectionist implementations (Rager and Berg, 1992).
The work with the highest Profile, however, has been emanating (mainly) from the AI lab at MIT under the leadership of Robert Berwick. Of especial interest here are the parsing system PO-PARSER (Principle-Ordering Parser) (Fong and Berwick, 1991, and Fong, 1991), and the machine translation system UNITRAN (Universal Translator: Dorr, 1990 and 1991). Kazman (not of MIT) has also produced interesting work relating to FLA (Kazman,1991). Using a parser called CPP (Constrained Parallel Parser) he has shown that by resetting various (adult) parameters all the sentences of two chosen
20
children between the ages of 24 and 29 months can be successfully parsed. Further, as the children age the parser with the child's initial settings fails on an increasing number of sentences whilst the adult settings produce increasingly successful parses.
Each of the above examples has been implemented and in the face of what seem like substantial architectural and computational design problems. That is, although it is reasonably easy to see how the various principles fit together conceptually within PPT, this does not tell us how a principle-based parser should proceed in constructing a parse. In fact, it might be thought that such parsers will encounter the same problems of non-determinism as the archaic TTG-based parsers mentioned earlier. Indeed, overgeneration is the major problem for such parsers.
The fault lies in the nature of the set of principles, each of which only contributes a small part to the overall effect of a structure. In terms of parsing, each principle will not constrain the final sentence structure to any great degree; it is the principles in combination which gives the theory its force rather than any one individual axiom. Consequently, each of the generator principles — such as X-bar theory — may license many thousands of structures, each consistent with the input string. Even applying the filtering principles — such as Case and -theory — to such sets will still often result in large numbers of postulated structures.
Of course, such overgeneration will lead to problems of slow parsing. In order to overcome this, various control regimes are imposed upon the principles. One possibility involves different orderings on the application of the principles. Fong has shown that certain sequences produce parses orders-of-magnitude faster than others. Indeed, Fong's PO-PARSER also allows dynamic principle ordering so that the parser can change its sequencing depending on the sentence type being parsed; this typically also increases the speed of the parse.
An alternative control Strategy is to co-routine the principles, interleaving one with the other. For example, the parser might start building a piece of Structure based on X-bar theory, then break off to check this partial structure against Case and 0-theory, and then return to its structure building.
Other questions of some import relate to which particular levels of the grammatical theory are to be computed. For example, some of Johnson's parsers work without constructing either D- or S-Structure (Johnson, 1991).
21
Experimenting along these lines, principle-based parsers have now been built which run at least as efficiently as large rule-based systems, producing parses within a few seconds. One can only imagine that future research will lead to even further gains.
CONCLUSION
The ostensible theme of this paper has been the choice between two contrasting GFs as potential components of an ICALL system. As such, we have seen that there are a number of reasons converging on the choice of PPT. However, the deeper thesis has revolved around the nature of the proposed criteria. As an interdisciplinary exercise ICALL must be sensitive to criteria pertaining to related fields. In the particular case, the choice of GF has stemmed from considerations relating to linguistic theory and SLA as well as the more obvious concerns of computational efficiency. A more complete discussion might well branch out into more general questions of psycholinguistics and cognition. The central claim is that this wide-angle view should equally be applied to any aspect of ICALL — indeed, to CALL in general — whether it be other aspects of the knowledge domain Or questions relating to the student and tutoring modules. Returning to the metaphor of the conference, the bridges linking ICALL to other disciplines are to be seen as furnishing essential supply lines of information rather than some kind of optional tourist attraction. The richness and complexity of the resultant theories will raise questions of the utmost difficulty but that is as it should be since it reflects the nature of second language learning.
NOTES
1 The majority of work in ICALI, has concentrated on the grammatical domain with error correction being the main tutoring strategy. Such work appears to sit uneasily with the communicative methodologies that currently hold sway in pedagogical theory. Accordingly, ICALL has occasionally been dismissed as being irrelevant to learning needs. This claim misses various points. For example, any complete ICALL system should be able to detect and correct errors — just as any human teacher can do. Error detection can tell us much about the current state of knowledge of the language learner. Armed with such information, the human teacher may respond in various ways; for instance, choose to ignore it, offer overt correction, ask another question which may focus the learner on the problem area or decide to move to another topic area more in keeping with the learner's current ability. Current systems are weak partly in the range of errors that they can detect and also in the (lack of) flexibility with which they can
22
respond. The claim is, then, that error detection and correction is a valid part of any complete ICALL system but that because of the limitations of current knowledge it appears to be the sole objective. Similar remarks can be made with regards to grammatical form; any system must be able to handle grammatical form, even for communicative purposes, since it is a crucial determinant of both semantic and pragmatic structure. Current ICALL concerns should, then, be seen as developing subsystems that will eventually take their (perhaps limited, with respect to, tutoring) part within the ultimate ICALL system.
2 At the conference I claimed that the only (passing) reference to its potential use within ICALL seemed to be Ghemri, 1991. It came as a (pleasant) surprise to find the very next presentation by Melissa Holland described work using PPT developed at the U.S. Army Research Institute Alexandria.
3 This last example is something of a maverick approach since it is based on the assumption that the mapping from text to semantic structure can be achieved without the mediation of a syntactic component.
4 Note that we are not claiming that the various grammar frameworks under consideration should, directly, form the basis of instruction. It is true, for example, that Fum, et al. (1992) and Pijls, et al. (1987) have chosen systemic grammar and IPG, respectively, because they believe that they provide a suitable pedagogic as well as linguistic/computational grammar. However, it seems quite clear that PPT does not fulfill this role (nor, for that matter do DCGs). If PPT is to form the grammatical base of an ICALL system, we will have to assume that there is an intervening pedagogic grammar which mediates between the computational/linguistic grammar and the user (see Chanier, et al., 1992, for some discussion):
Computational -> Pedagogic -> User
Grammar Grammar
Clearly, there are considerable problems in determining the link between the computational and pedagogic grammars.
5 We remain neutral on this point since if the various principles of PPT are (innately) still available for SLA then an ICALL system may be able to simply ignore them. See Cook, 1989, for some discussion.
6 This is not true if -role assignment is directional.
7 The presentation closely follows the proselytizing papers of Berwick (1991) and Berwick and Fong (1990).
8 For example, the Earley algorithm for context-free languages can quadruple its parsing time when the grammar is doubled.
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REFERENCES
Abeillé, A. (1992)."A Lexicalized Tree Adjoining Grammar for French and its Relevance to Language Teaching," M. Swartz and M. Yazdani (Eds.), 65- 87.
Atkinson, M. (1992). Children's Syntax: An Introduction to Principles and Parameters Theory. Basil Blackwell: Oxford.
Bailin, A. (1991). "ICALI Research Investigations in Teaching and Learning," CALICO Journal, 9, 5-8.
Berwick, R. (1991). "Principle-based Parsing," P. Sells, S. Shieber and T. Wasow (Eds.): Foundational Issues in Natural Language Processing. Bradford Books, MIT Press: Cambridge, Mass., 115-226
______. (1991a). "Principles of Principle-based Parsing," R. Berwick, S. Abney and C. Tenny (Eds.), 1-37.
______, S. Abney and C. Tenny (Eds.) (1991). Principle-based Parsing: Computation and Psycholinguistics. Kluwer: Dordrecht.
______, and S. Fong (1990). "Principle-based Parsing: Natural Language Processing for the 1990's," P. Winston and S. Shellard (Eds.). 287-325.
Catt, M. and G. Hirst (1990). "An Intelligent CALI System for Grammatical Error Analysis," Computer Assisted Language Learning, 3, 3-26.
Chanier, D., M. Pengelly, M. Twidale and J. Self (1992). "Conceptual Modeling in Error Analysis in Computer-assisted Language Learning Systems," M. Swartz and M. Yazdani (Eds.), 125-150.
Chen, L. and L. Barry (1989). "XTRA-TE: Using Natural Language Processing Software to Develop an ITS for Language Learning," Fourth International Conference on Artificial Intelligence and Education, 54-70.
Chomsky, N. (1986). Knowledge of Language: Its Nature, Origin, and Use. Praeger: New York.
______. (1986a). Barriers. MIT Press: Cambridge, Mass.
Cook, V. (1989). "Universal Grammar Theory and the Classroom," System, 17, 169-181
Dorr, B. (1990). "Machine Translation: A Principle-based Approach," P. Winston and S. Shellard (Eds.). 327-361.
______. (1991). "Principle-based Parsing for Machine Translation," R. Berwick, S. Abney and C. Tenny (Eds.), 153-183.
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du Plessis, J., D. Solin, L. Travis and L. White (1987). " UG of not UG, That is the Question: A Reply to Clahsen and Muysken," Second Language Research, 3, 56-75.
Feuerman, K., C. Marshall, D. Newman and M. Rypa (1987). "The CALLE Project," CALICO Journal, 4, 25-34.
Fong, S. (1991). "The Computational Implementation of Principle-based Parsers,' R. Berwick, S. Abney and C. Tenny (Eds.), 65-82.
______, and R. Berwick (1991). "The Computational Implementation of Principle-based Parsers," M. Tomita (Ed.) Current Issues in Parsing Technology. Kluwer: Dordrecht, 9-24.
Fum, D., B. Pani and C. Tasso(1992)."Naive vs. Formal Grammars: A Case for Integration in the Design of a Foreign Language Tutor," M. Swartz and M. Yazdani (Eds.), 51-64.
Ghemri, L. (1991). "Specification and Implementation of a GB Parser," C. Brown and G. Koch (Eds.) Natural Language Understanding and Logic Programming 3. North-Holland: Amsterdam. 11 1-126.
Handke, J. (I 992). "WIZDOM: A Multiple-purpose Language Tutoring System Based on AI Techniques," M. Swartz and M. Yazdani (Eds.), 293-305.

Senin, 28 November 2011

Face-to-face and Computer-mediated Peer Review in EFL Writing

Mei-ching Ho

The Arizona State University

Sandra J. Savignon
The Pennsylvania State University

Abstract:
       This paper examines the use of face-to-face peer review (FFPR) and computer-mediated peer review (CMPR) in an Asian English-as-a-foreign-language (EFL) academic writing context. The participants were 33 English majors from a university of science and technology in Taiwan, a new type of school offering 2-year associate degree programs in foreign language studies. Our study contributes to the research on foreign-language-writing collaboration for Chinese learners in two important ways. First, many investigations of FFPR have looked at Chinese learners either in English as a second language (ESL) settings or at 4-year universities. Few have considered Chinese learners at 2-year colleges in EFL contexts. Second, there has been very little documentation of CMPR using annotation features in common word processing software in either ESL or EFL settings (Honeycutt, 2001). This study investigates the attitudes of 2-year college students in Taiwan toward the use of FFPR and CMPR in composition classes. Pedagogical implications are also drawn.

KEYWORDS
Face-to-face Peer Review, Computer-mediated Peer Review, Second Language Writing, EFL Learners.

INTRODUCTION
      Writing instruction in English as a second language (ESL) has seen considerable change following the influence of the process approach in the 1980s (Leki, 1992; Raimes, 1991; Reid, 1993; Zamel, 1987). This approach emphasizes writing as a process in which prewriting, multiple drafting, and revising are considered important in helping learners develop their skills. During multiple drafting, peer review is often used to afford learners experience in expression, interpretation, and negotiation of meaning. Such engagement in authentic communicative events offers an optimal opportunity for language learning (Savignon, 1983, 1997). Teachers typically ask learners to bring drafts of their writing to class where they then work in groups of two to four to read and comment on one another's writing. This exchange of feedback helps writers to clarify and give form to their meaning in subsequent drafts.

       There are several variations of peer review (Grabe & Kaplan, 1996; Zhu, 1994). Learners can read one another's papers silently or aloud. Partners can be assigned by the teacher or chosen by learners themselves. In some settings, teachers provide a peer review worksheet with guidelines as to what to look for while reviewing another's text (e.g., content, organization, and coherence). Learners are encouraged to comment not only on the strengths of the text but on its weaknesses as well. The practice of peer review is seen to offer advantages for learners in a variety of ways. Peer response groups may raise learners' audience awareness, foster collaboration, help learners develop a sense of discourse community, offer ideas and strategies for revision, and, most important, "expose learners to a variety of writing styles" (Grabe & Kaplan, 1996, p. 386; see also Nelson & Murphy, 1993; Spear, 1987).

     Peer review has become a common activity for learners of different writing proficiency levels in many first language (L1) and ESL contexts (Grabe & Kaplan, 1996; Nelson & Murphy, 1993; Villamil & Guerrero, 1996). However, very little is known about the use of process-focused peer review activities in EFL contexts. This is especially true for Asian contexts in which teacher-centered classrooms are the norm. In Taiwan, for example, along with relatively large class sizes, teacher-centered grammar-based instruction remains widespread (Wang, 2000). If appropriate and effective classroom practice is to be implemented, further exploration is needed of learners' attitudes toward learner-centered and communication-based activities such as peer review.

     The goal of peer review is to foster an atmosphere of reciprocal teaching between learners. The theoretical basis for the use of peer review in the development of writing skills, both in L1 and second language (L2) development, can be traced to (a) the notion of reciprocal teaching/scaffolding (Donato, 1994; Nystrand, 1986; Spear, 1987) and (b) the communicative approach to language teaching (CLT) (Elbow, 1981; Savignon, 1983, 1997, 2002). Second language writing pedagogy has felt the influence of both perspectives (Grabe & Kaplan, 1996; Reid, 1993). Communication, spoken and written alike, is the central focus of CLT and involves "a continuous process of expression, interpretation, and negotiation of meaning." (Savignon, 1997, p. 14; 2002, p. 1). The nature of peer review activities highlights this process. The basic insight of reciprocal teaching/scaffolding in the development of writing skills is that learners learn from one another by giving and receiving advice on the content, organization, and language use of their writing.
Computer-mediated peer review (CMPR) is a recent innovation in writing instruction. Along with the increasing availability of networked computers, computer-mediated communication (CMC) has gained importance in language teaching, especially in the teaching of composition. This study takes into consideration therefore both FFPR and CMPR.

LITERATURE REVIEW

Peer Review in Language Learning
       Numerous reports on the use of peer review in both L1 and ESL settings have explored aspects of peer review activities. These include learners' reactions and negotiation patterns, teachers' roles in peer review training, the effects of peer response on learners' writing, and learners' attitudes and affective benefits (Berg, 1999; Mangelsdorf, 1992; Mendonca & Johnson, 1994; Nelson & Murphy, 1993; Paulus, 1999; Villamil & Guerrero, 1996; Zhang, 1995). However, the findings are generally inconclusive. While some studies report the positive effects of peer review (Berg, 1999; Mendonca & Johnson, 1994), others show contrary findings (Carson & Nelson, 1996, 1998; Zhang, 1995).

         Mendonca and Johnson (1994) investigated peer negotiation in an ESL writing class at a major university in the northern United States. To examine the negotiation patterns of graduate student learners of English working in pairs, they analyzed audio-taped peer review sessions and learners' written drafts. In addition, posttask interviews were conducted to solicit learners' perceptions toward the usefulness of the peer review dyads. Five types of peer review negotiations were identified: asking questions, giving explanations, making restatements, offering suggestions, and correcting grammar. The analysis showed that during peer review learners focused on both local and global issues of their writing and that after negotiation they appeared to have a better understanding of its strengths and weaknesses. More important, learners developed audience awareness through peer review activities. The authors concluded that the learners in this study found peer review to be beneficial. In addition, peer review was found to "enhance students' communicative power by encouraging learners to express and negotiate their ideas" (1994, pp. 765-766).

       Berg (1999) examined the effect of peer responses from ESL learners who received peer review training on revision types and writing quality. The results showed that revised drafts from trained peer response groups contained more macrolevel changes such as changes in the content and meanings. Learners who had received training achieved higher scores on their second drafts than did those who did not. These findings suggest that peer review used with guidance can help ESL learners to improve their writing.

         Other studies have similarly shown peer review to positively influence ESL learners' writing (Mangelsdorf, 1992; Nelson & Murphy, 1992; Stanley, 1992). However, other studies have challenged those findings. Zhang (1995), for example, explored the "affective advantage" of peer feedback in ESL writing classes, advantage in terms of being more writer supportive and less text appropriating than using other means (Clifford, 1981; Elbow, 1973; Purves, 1984). To determine whether L2 learners felt such affective advantages, Zhang reexamined the use of peer review in ESL classrooms. The participants in this study were 81 ESL learners from one private college and one state university in the western United States. All learners were exposed to teacher-, peer-, and "self-directed" feedback types (1995, p. 214). ESL learners were found to "unequivocally" have a strong preference for teacher feedback as opposed to peer feedback, with learner-centered self-feedback the least popular option. Zhang concluded that the use of peer review in ESL classrooms should be carefully examined by teachers since the affective advantage of peer feedback that has been found in L1 settings does not necessarily apply to ESL learners. Zhang also advised teachers to take learners' cultural backgrounds into consideration when adopting the use of peer response groups in class.

         Several reasons have been suggested for ESL learners' seemingly unfavorable attitudes toward peer review and the failure of peer feedback in L2 settings to guide learners toward effective revision. First, since learners have to give comments on their peer's writing during peer review, some students might not feel comfortable doing so face-to-face (Spear, 1987). Second, since they are still developing their own writing proficiency, ESL learners may not trust their peers' response (Paulus, 1999). This might explain why some studies have found that ESL learners prefer teacher feedback to peer response. It may also be the case that peer review is experienced as a threat to the learners' concept of positive face or their positive self-esteem (Brown & Levinson, 1987; Scollon & Scollon, 2000), and that they therefore may tend to avoid it.

       Eighty-six percent of the participants in the Zhang (1995) study described above were from Asian backgrounds. The suggestion has been made therefore that the findings may have particular significance for teachers of Asian ESL or EFL learners. Because of what is sometimes claimed to be a relatively higher value placed on group over individual achievement in Asian culture, speculation has been made that Asian learners may feel especially uncomfortable commenting on one another's writing They would therefore potentially have unfavorable attitudes toward peer review. Accordingly, Carson and Nelson (1996) proposed that learners from what they term "collectivist" cultures, including Taiwan and the People's Republic of China (PRC) "are more concerned with effects of their actions to others" (p. 1); learners from Western countries, on the other hand, are seen to value individualism and "function more often for the benefit of the individual writer than for the benefit of the group" (p. 2).

        It may well be the case that individualism is advantageous when learners doing peer review are expected to state their own ideas and opinions. If so, to the extent that a group of learners may be said to share identifiable attributes,their different cultural backgrounds may need to be taken into account in judging reactions to peer review activities and feedback. In a subsequent study, Carson and Nelson (1998) looked specifically at cross-cultural issues in peer group interaction. Participants included three speakers of Chinese and eight speakers of Spanish from an advanced ESL writing class at a large US urban university. They found that both Spanish and Chinese learners valued the teacher's comments over those of their peers and preferred feedback "that identified problems in their drafts" (p.113). However, learners from different cultural backgrounds were seen to have very different types of interactions as well as views on peer review activities. During peer review sessions, Chinese ESL learners "frequently refrained from speaking because of their reluctance to criticize their peers, disagree with their peers, and claim authority as readers" (p. 127). While the Spanish learners' interactions were "task oriented," the Chinese focused on "maintain[ing] group harmony" (p.127). In other words, Carson and Nelson found the Spanish learners to be more active in pointing out the problems in their peers' writing for revision. The Chinese learners on the other hand tended not to criticize others' work and not to disagree with them. Accordingly, they concluded that peer response groups in a classroom in which the majority of learners are from what they considered to be "collectivist" cultures may not be as effective as those in a setting where learners are from cultures that value individualism.

Computer-assisted Language Learning

        The trend toward computer-assisted language learning (CALL) and computer-mediated communication (CMC) in language learning have influenced the teaching of writing in both L1 and L2 settings. More and more writing teachers have started conducting classes in networked computer labs or incorporating writing activities that engage learners with the use of computers (Warschauer, 1996). Computer-mediated peer review (CMPR), for instance, is one of the activities used to enhance learners' L2 writing. With networked computers, learners can do peer reviews online anywhere at anytime. Learners exchange drafts and feedback via email and communicate with one another through the use of interactive software programs. Not only can CMPR offer flexibility for both teachers and learners, it may also reduce psychological pressure on learners who do not like to give feedback in face-to-face situations. Depending on the kind of software used, CMPR could be used synchronously during regular class time or asynchronously at the convenience of the learners (see DiGiovanni & Nagaswami, 2001; Savignon & Roithmeier, 2004).

         To date, several studies have been conducted to examine CMPR in L1 and ESL writing classes in which researchers assert the advantages of CMPR. (Brown, Nielson, & Sullivan, 1998; Dean, 2001; DiGiovanni & Nagaswami, 2001; Skinner & Austin, 1999). Among them is an increase in learner motivation due to the new medium of expression. Colomb and Simutis (1996), Kelm (1992), Kern (1995), and Warschauer (1996) have all reported that the use of computers increases learners' motivation in second or foreign language writing.

         Skinner and Austin (1999) conducted research on synchronous computer-mediated peer conferencing. Computer conferencing, designed as a prewriting activity, involved 22 reportedly East Asian ESL learners using synchronous chat to communicate in groups on assigned topics. They found that by using online conferencing, learners formed a virtual community for communication. This not only offered a new means of communication but also helped learners reduce their anxiety in speaking and writing in a second language. Kern (1995) similarly reported the motivational benefits of computer use in foreign language learning, including increased learner expression, reduced "anxiety related to oral communication," and creation of "a collaborative spirit among learners" (p. 461). Of considerable significance, learners in this study who were often unwilling to participate in face-to-face discussion interacted more "actively" with peers during computer conferencing sessions (p. 470).

         Huang (1998) also suggested that FL writing teachers incorporate computer-mediated (CM) activities such as CMPR into their classrooms in order to create "variety in classroom activities" and to "provide a non-stress environment for learners who are shy or overly concerned about their oral language proficiency" (p.2). DiGiovanni and Nagaswami's (2001) research on synchronous CMPR in ESL writing classes at a community college in the US led to similar recommendations. They compared the face-to-face and online interactions of 52 ESL learners and analyzed those interactions by adapting the negotiation categories presented in Mendonca and Johnson (1994). For their online interactions, learners in this study used Norton Textra Connect,1 a software program for split screen electronic communication. A split screen protocol features character-by-character transmission rather than whole message transmission, allowing learners to view drafts 'letter by letter' as they are being produced in one window while simultaneously producing feedback to the writer in another window on the computer screen. DiGiovanni and Nagaswami found that more than half of the participants who used the split screen protocol felt that CMPR was more comfortable and interesting than FFPR and, important, felt that they did better reviewing online.

         Although research shows CMPR may have positive effects on learner motivation, it is worth noting that CMC is very different from face-to-face communication and could generate different types of interactions which might affect the effectiveness and quality of feedback. As noted above, CMPR may be conducted synchronously (for example, chat, ICQ, MUDs, etc.) or asynchronously (email, listserv discussion list, etc.), depending on the software used. The medium used for communication could affect language and language use in terms of style, coherence, etiquette, message length, and other features (Herring, 2002a).

RESEARCH QUESTIONS
         This study examines the use of face-to-face and asynchronous computer-mediated peer review in academic writing classes at a university of science and technology (UST) in Taiwan offering 2-year associate degree programs in intensive language study.2 In recent years, the number of learners enrolled in this new type of school has increased dramatically. The goal of the study reported here was to investigate the perceptions and attitudes of learners in this particular setting toward FFPR and CMPR and to determine whether CMPR as used in this study might be a good supplement to FFPR in writing classes. The specific research questions are the following:
1. How do learners in a UST react to face-to-face and computer-mediated peer review?
1.1 Do learners in a UST feel they benefit from doing face-to-face peer review?
1.2 Do learners in a UST have generally favorable attitudes toward computer-mediated peer review?
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2. What are the learners' perceptions concerning the annotation features of CMPR used in this study?

METHOD

Setting and Participants
         The participants were 37 English majors, 12 males and 25 females, at a national university of science and technology in Taiwan who comprised two intact classes in academic writing taught by two different teachers in the spring 2002. Learners who enroll in this kind of program have heterogeneous English learning backgrounds, but, to be admitted to the program, all must pass a nationally standardized entrance exam which evaluates their English proficiency. Therefore, although learners' English learning backgrounds may differ, the learners in this study had attained a similar level of language study. While most traditional English departments at universities in Taiwan focus on English literature, the English department in this particular setting emphasizes the teaching of English for practical use. The primary objective of the program is to prepare learners for working in an environment in which English is the primary means of communication. There are three major tracks in the program: business and technical English, English interpretation and translation, and English language teaching. Advanced Writing I, II, III, and IV are required courses for students in all three tracks. Each level requires one semester to complete and has different themes in different tracks. The department incorporated peer review activities as one of the assignments for all levels of the writing courses.

        Of the total of 37 participants, 18 were from a senior writing class (IV) taught by an English native speaker, and 19 were from a junior writing class (II) taught by a nonnative speaker of English with a Master's degree in TESOL from an American university. Although the focus of instruction for the two classes differed somewhat, both teachers used peer review to enhance learners' writing skills. In the senior writing class, students learned academic writing skills, including paraphrasing, quoting, and synthesizing outside sources. The students were required to complete two research papers during the semester. The teacher in the junior class structured the class based on instruction in different writing modes or genres (e.g., comparison and contrast, definition, classification, and argumentation). The students in this class were required to write short essays on assigned or self-selected topics.

Procedure

        The researchers first sought approval for doing this study from the chair of the English department at the UST. They then informed instructors of junior or senior academic writing classes via email of the purpose of this research. Two instructors in the department were willing to help by seeking volunteers in their classes. Neither instructor had ever used computer-mediated peer review in their instruction and were interested in trying it for a semester. During regular class hours, the teachers told the EFL learners of the purpose of the study, requesting voluntary participation. All of the learners in both classes agreed to participate and were assured that their expression of personal preferences for any type of peer review mode in the survey would in no way affect their grades.

Face-to-face peer review

         Since both instructors had had learners do face-to-face peer review (FFPR) before the time this study was conducted, the researchers interviewed both instructors via email to better understand the overall context and how FFPR sessions had been conducted. In both classes, learners were required to write three drafts for each writing assignment. Most often, teachers asked learners to bring in their first draft and paired learners for the exchange and review of each other's drafts. In reviewing the first two drafts, learners were asked to focus on global features of their peer's text (e.g., content, organization, and coherence). Afterwards, the learners themselves checked the local features of their own text before submitting a final draft. In the junior class, learners selected their own partner. However, the teacher encouraged learners to work with a different person for each peer review session during the semester. Learners in the senior class, on the other hand, were assigned to a partner. According to the instructor, learners' ability level was the most important criterion for selecting a partner for each learner. As Instructor two (T2)3said, I pair them by ability level. Sometimes good with good, poor with poor, but usually good with poor, or good with mediocre ability. Rarely good with good, because there aren't enough good ability students to go around, but then again it isn't fair to always put someone who has good writing ability with someone who isn't as good. It's hard. I will also consider their personalities and their gender to some degree-making sure they can get along and the males won't dominate the females-but their ability level is always the first consideration.

       Even though both classes had experience with peer review dyads in which learners focused on the global issues of writing, the procedures for conducting peer review sessions were somewhat different. In the senior writing class, due to time constraints and the length of written assignments, most peer review sessions were conducted by learners outside of class. The learners reviewed an assigned peer's draft by following the instructions on the peer review worksheet provided by the teacher. In addition to pointing out the strengths and the weaknesses of their peer's writing, learners were required to give suggestions for revision. To track the activity and to facilitate learners' future revision, the instructor also required learners to provide written feedback, which was typically reviewed by the instructor before being given to the peer. In the junior writing class, since most written assignments were no more than two to three pages long, learners conducted all peer review sessions in class. The teacher also provided peer review guidelines (worksheets) and expected learners to give written feedback.

       Initial email correspondence with the instructors suggested that they had similar concepts of face-to-face peer review activity. The following excerpts from the email exchanges between the researchers and the two instructors are indicative of the teachers' rationale: peer review helps learners to realize some common errors which might happen to their classmates and to themselves as well. Also, by correcting others' papers, learners will have better ideas about essay organization … . Learners learn to trust their peers' correction, instead of relying heavily on teachers' feedback. (QUE01/T1)
I want them to internalize the peer review process so they can use it with their own papers when no peer is available … when it [peer review dyad] works out right because when a learner has the right peer feedback at the right time a breakthrough in improving his/her writing can occur. (T2)

Computer-mediated peer review

       Since none of the learners had had prior experience with computer-mediated peer review (CMPR), researchers cooperated with instructors to set up the activity. In the senior class, most regular class hours were used for one-on-one teacher-learner conferences in the instructor's office; learners did not typically work together in class. Therefore, the instructor suggested having learners do CMPR outside of the class as an assignment. Since CMPR in this study involved only email and simple annotation features in common word-processing programs, learners could easily complete their tasks asynchronously at home or in the computer lab at school. To guide them initially, the instructor asked learners to email their drafts as an attachment and provide their feedback directly on their peer's computer draft using "Track Changes" in Word as shown in the examples below. Learners then emailed the draft with feedback to the peer. In the junior-level class, the teacher agreed to adopt CMPR during regular class sessions, scheduling them in a networked computer lab. The procedures of CMPR were the same as those used in the senior class. Both classes adopted CMPR during the second half of the semester. During CMPR, the learners read the drafts and typed the feedback on the computer. There was no exchange of printouts or paper-based feedback.

        The major feature of "Track Changes" is to document every change made in a text, including questions, comments, insertions, and deletions. By using "Track Changes," learners were able to insert feedback adjacent to a problematic sentence or paragraph. These changes automatically appeared in a different font color along with a text box. As can be seen in the following examples, feedback can be interwoven in the texts or shown in text boxes in the margin. (Colored font has been replaced here with italics). Depending on the version of Word, the feedback may appear in a different place. For example, in Word XP, the comments and deleted words are highlighted in a small textbox in the margin.

Example 1
In 2001, according to the estimate of the economic prosperity center of National Statistics Bureau, the average income of each rural farmer in 2000 is two thousand four hundred and thirty four renminbi. In addition, provinces like Qui-Zhou, Xi-Cang, Gan-Su, Quing-Hai, Yun-Nan, Some readers might not know where the places are, please add more information to make it clearer to your readers. the average income is lower; especially in Qui-Zhou province, the average farmer's earning is only one thousand one hundred and thirty six renminbi.

Example 2
(It would be better to start with your T.S. , and also reveal your main idea first, so reader can probably know what you gonna talk about in your paper, and continue to read it) Many elementary schools' English teachers in Taiwan face a serious problem: students do not like to read. A survey (investigating Taiwan's children's reading interests) conducted by Lin shows children's favorite extracurricular activities are: watching TV (73.4%), playing games / chatting (63.1%), reading informal readers (49.5%), and playing video games (49.3%).

Example 3
Teachers should take reading picture books as an interest, rather than a purpose of test, otherwise will eliminate students' reading motivation. Arousing children's desire of reading will prepare them to read more in their lifelong time. (could you explain more why teachers "should" take reading picture books as…) Seems like you don't have a strong conclusion. You can add one or two more sentences restated about "picture book"(which is your main idea) and the three characteristics to conclude the paragraph and this paper.
p.s. the information and examples in the paper are very good. I suggest you can add more examples and explain how the three characteristics work together when you extend this paper from 5 to 8 pages.

Example 4
Teachers can go through the cover page and the first page first without revealing the points and the outcome of the story. Then students will become very curious to find out what is happening next and start to read (2001). You can add one more sentence to conclude (summarize) this paragraph. Ex, "so the first characteristics of picture book, "picture", can…..The second characteristic that picture books functions to arouse children's interest is the 'pattern'. You can explain what "pattern" means here first. To give an easy and clear explanation will make readers understand what you say in this paragraph. Picture books are patterned with repeated phrases, rhythms, and refrains that can appeal students to start reading.

Example 5
In this character of this story, Guloong is a painstaking, intelligent, responsible and paying deep love for his lover and family. Therefore, there is a special holiday is called "Qixi" (0x01 graphic)to commemorate their love. Does Qixi relate to this topic? According to these three descriptions, "Cowboy" could be commented with different meanings because different countries, culture or nations.

Suggestion:

1. There's no exact relation between the English word "Cowboy" and the Chinese expression 0x01 graphic. 2. Therefore, I suggest that you focus only on the Chinese one. 3. Try to give definition for its original meaning, then relate to its current usage.

Data Collection and Analysis

        To investigate the EFL learners' perceptions of both FFPR and CMPR, a questionnaire was developed that included three parts: a biographical section, 30 items using a 5-point Likert scale (5 indicating strongly agree and 1 strongly disagree), and 5 open-ended questions. The biographical section asked for learners' previous major and English learning experience. The 30 Likert-scale items were designed to measure learners' attitudes toward both peer review modes as well as specific features of CMPR, including "Track Changes," and "reading drafts and offering feedback on the computer."

      The two EFL instructors distributed the questionnaires to the participants together with an informed consent form. All 37 participants remained anonymous. Since both instructors allowed learners to fill out the questionnaire during the regular class hours or teacher-student writing conferences, there was a 100% return rate. However, four questionnaires had incomplete responses and were excluded from data analysis.
The 30 Likert-scale items were tested for reliability coefficients (Cronbach's alpha). Responses to the 30 items were then coded and imported into SPSS for descriptive statistics analysis. For the purpose of analysis, responses to items that were phrased negatively were transposed. To determine whether learners' answers to an item significantly differed from the mid-point of the scale (3), all responses were submitted a one-sample t test with the hypothetical mean score of 3 and a confidence interval of 95%.

       In addition to the Likert-scale items, five open-ended questions were developed. The purpose of these questions was to elicit reasons for an expressed preference for a certain peer review mode that may not have been captured by the Likert-scale items as well as to identify the benefits and problems learners experienced. Learners' responses to each open-ended question were read, major topics identified, and similar topics or opinions grouped together to form categories. The first four open-ended questions were designed to elicit detailed information about the problems and benefits learners experienced during both FFPR and CMPR. In the final question, three ways of doing peer review (i.e., FFPR, CMPR, and a combination of the two) were juxtaposed. In their responses, learners were directed to indicate their preference and give reasons for it. The rationale for including the option of a combination of the two peer review modes was to better understand learners' perceptions of how peer review activities should be conducted. In this study, CMPR was based mostly on written communication; few verbal exchanges were involved. Ong (1977) convincingly argued that a person's visual and vocal senses complement each other to foster superior intellectual development. To promote such an advantage, Schultz (2000) suggested that "the verbal characteristics" of FFPR such as oral discussion and "the visual characteristics" of CMPR such as typed comments be used in combination to benefit foreign language learners the most (p. 141). Given that the learners in this study had already experienced both FFPR and CMPR, the option of "the combination of the two modes" was included. In the discussion that follows, learners' responses to the open-ended questions are organized according to the advantages and disadvantages of both FFPR and CMPR.

RESULTS

       The reliability coefficients for the 30 Likert-scale items are presented in Table 1. According to Sax (1989), a reliability coefficient of more than .6 is required for a self-designed text or survey. The CMPR and features (including Track Changes, font color, and spelling and grammar checks) of CMPR scales achieved alphas of .69 and .71, respectively. The alpha for the FFPR scale was a less than satisfactory .50. The FFPR was the scale with the fewest number of items. The coefficient could perhaps have been improved if the number of items in this scale had been increased (Henning, 1987).

Learners' Perceptions of Peer Review

       The descriptive statistics in Table 2 show learners had favorable attitudes toward face-to-face peer review (M = 3.95,SD = 0.41, t = 13.29, p < 0.01). Items 1, 9, and 25 had a mean score higher than 4, indicating a high agreement among learners. More than 82% of learners agreed that peer review helped them improve their writing and should be used in writing classes. In addition, as many as 92% of the learners agreed that they benefited from reviewing their peer's writing. This last finding may reflect what Grabe and Kaplan (1996), Reid (1993), and Spear (1987) have argued, namely, that peer review can boost learners' confidence as a second language writer because they can see other learners also make mistakes and struggle with the writing.

       As Table 3 shows, when asked if they liked to do computer-mediated peer review, learners did not express very strong agreement (M = 3.52, SD = 0.41, t = 7.25, p < 0.01). The mean score (3.12) of item 24 was not significant. Although as many as 67% of the learners liked to use "Track Changes" when providing feedback on the document (Item 26: M =3.81, SD = 0.76), only 46% said they wanted to continue doing CMPR in the writing class. The same percentage of learners (46%) chose not to agree or disagree (Item 11: M = 3.33, SD = 0.77). Overall, learners had less favorable attitudes toward CMPR than toward FFPR.

Learners' Reaction to Features of CMPR

       The features of CMPR examined in this study include: exchanging drafts via email, Track Changes, font colors, spelling and grammar checks, the nature of typed feedback on the drafts, and reading drafts on the computer. Thirteen items were designed to investigate what features learners found helpful when doing CMPR and what features they found difficult to use. Table 4 shows most learners felt that "Track Changes" was very convenient for giving feedback (Item 17: M = 3.94,SD = .65, t = 8.19, p <.01) and that exchanging drafts via email was efficient (Item 29: M = 4, SD = .93, t = 6.14, p < .01). In addition, learners generally think the spelling and grammar checks are useful, and typing feedback right after/next to problematic sentences and paragraphs is helpful and easy to read. However, when asked if reading drafts on the computer is difficult, most learners chose to remain neutral (Item 8: M = 3.15, SD = 1.09, t = -0.79, not significant)

Responses to Open-ended Questions
Face-to-face peer review

       The major advantage learners associated with FFPR was that they were able to talk with peers during the review session, which enabled them to seek clarification and negotiate meanings to avoid misunderstanding. Most learners found that this not only eased the peer review process but that it also made the peer review more effective because many found speaking more efficient than writing. One learner wrote, "I can discuss my problems with my peers in detail. Through this face-to-face process, I always get useful suggestions from my peer." In addition, some learners mentioned that when encountering complicated ideas or disagreement, they liked to discuss in their native language. A senior learner wrote, "My partners and I can directly point out each other's weak points in our writings. Oral feedback is more efficient to me than written feedback. When I felt it's difficult to talk in English. We preferred to speak Chinese … ."
  
        Learners also reported several problems in these sessions. They often did not have enough time to read and comment on each other's writing. They typically rushed through a review without fully explaining the problems they found or the questions they had. Some also found it difficult to come up with specific suggestions in a limited time. One learner wrote, "I could not immediately provide a suggestion to the problem of my partner's paper … if time is limited, could not explain all the problems I found in the limited time." In addition, many learners felt uncomfortable pointing out their peer's problems face to face. Some indicated that they would avoid identifying problems in other's writing and try to encourage their peers in order to maintain a harmonious relationship. Sometimes, instead of specifically pointing out problems, they would suggest adding more details: "while I do face-to-face peer review, I wouldn't really criticize my peer's writing. I would rather encourage him/her to get more detailed information. This attitude would sometimes harm the writing progress of my peer. In short, the Chinese people's attitude-harmony might hinder writers from progress."

Computer-mediated peer review

       Learners reported two major advantages of CMPR. First, CMPR offered more flexibility than FFPR. Many indicated that since they and their partner did not need to be logged on to the computer at the same time, they could read and comment when convenient and at their own pace. Learners were able to take time to reflect on their ideas and rehearse responses to their partner. The use of "Track Changes" also made the reviewing process easier. Learners could edit and revise their feedback easily, and most learners found typing more convenient than handwriting. One learner wrote: "I think the benefits are as follows: it's easy to change any points I think not appropriate. It's easy to add whatever I want to express. It's clear to see my point to my peer's paper." It seems that being able to edit feedback on the computer was a real benefit for learners since typed feedback could be changed anytime before being forwarded to the author.

       In addition, most learners reported that they felt more comfortable and less pressure giving feedback on the computer. In CMPR, they did not have to face their peers, and, consequently, many seemed to worry less about their peers' reactions. One learner wrote, "We can say what we want and express our thoughts directly." Another stated, "while giving feedback [on the computer], I feel free to say anything I wanted to say without worrying about my peer's reaction."

       CMPR is not without disadvantages. As explained above, the opportunity for oral discussion was considered a major benefit of FFPR. Accordingly, the lack of verbal communication in CMPR was seen to be one of its drawbacks. One learner stated, "Some problems you face [during peer review] may be very complicated and you cannot explain very clearly [without talking to your peers]." Other problems cited relate to the use of email. A number of learners complained about the uncertainty of email transactions. A leaner from the senior class wrote, "my peer once mistyped my email address, and of course, I did not get my feedback;" another commented, "The mail might be lost while sending it to my partner, and it could be due to mail to the wrong address … ."

       The time delay in email also presented a problem for some. Some learners reported that their peers took advantage of this and failed to provide timely feedback: "my partners have excuses to give my feedback late" and "I waited a long time for the feedback but no one sent anything to me." In addition, some learners found reading drafts on the computer uncomfortable: "difficult to read drafts on the screen. Feel my eyes with fatigue," and "it was too hard to read things from the computer screen directly. My eyes would be extremely sore … ."
In response to the final open-ended question, 24 out of the total 33 (72%) said they preferred a combination of face-to-face and computer-mediated peer review. They felt that the two review modes could be used to complement each other. Of those learners who favored a combination of both peer review modes, many suggested that CMPR should be followed by face-to-face discussion. By so doing, they would be able to comment on each other's drafts on the computer at their own convenience and also have a chance to negotiate meanings and ask questions about the feedback they received. One junior learner wrote, "I prefer a combination of the two because I can read the feedback from CMPR first and then ask my peer about some questions in my paper face-to-face." Another stated, "A combination would be great. Doing online peer review first, then discuss [with peers] face-to-face. While doing FFPR, we could talk in our native tongue. This would make the whole communication process easier and clearer."

DISCUSSION

       Responses to the Likert-scale items suggested that although learners accepted both peer review modes, they had more favorable attitudes toward FFPR than CMPR. There was strong agreement with statements such as "Face-to-face peer review (FFPR) helps me improve my writing," "I benefit from reviewing the writing of my classmates," and "I think peer review should be used in writing classes;" whereas statements on CMPR such as "I like to do CMPR" and "I want to continue doing CMPR in writing classes" showed only moderate agreement. Responses to open-ended questions suggested some of the reasons for learners' preference for one mode over the other. Being able to discuss with peers was the most generally acknowledged benefit of FFPR. In contrast, lack of oral discussion was the most common drawback mentioned for CMPR. Although the learners found CMPR to offer several advantages such as flexibility in scheduling for review and a new means for editing feedback in the document, learners still considered oral discussion during peer review sessions to be critical. Given that peer review is a highly interactive activity in which learners constantly interpret and negotiate the meanings of one another's writing, speaking appears a more efficient mode and one that in many instances can prevent misunderstanding. In FFPR, learners not only provided written feedback, but they also had chances to clarify ideas and exchange opinions with peers. On the other hand, in CMPR, learners had to rely only on feedback on the document itself, something they considered a serious drawback.

       These findings should not be interpreted to mean that CMPR is not useful and should not be used in writing classes. Many special features such as "Track Changes" and "spelling and grammar checks" were found to be helpful and convenient. Moreover, many learners indicated that they preferred typing instead of writing while providing feedback. This finding is contrary to that of Huang (1998) who found typing skill to be an obstacle in CMPR for Chinese learners. These learners at a university of science and technology even found typing to be more efficient and convenient than handwriting.

       Although learners' attitudes were more favorable toward FFPR than toward CMPR, many found it somewhat stressful to review others' work face to face. They were afraid that in pointing out their peer's problems they might hurt the other's feelings or even damage their friendship. Some said that they would not critique and identify problems directly in order to maintain a friendly relationship. These findings corroborate those of Carson and Nelson (1996, 1998) that Chinese learners often avoid discussing problems and disagreeing with peers in order to maintain harmony. However, more research is needed to know whether this is a uniquely Chinese trait or whether learners from Western cultures behave in the same way. The second author of this research report has gathered substantial anecdotal evidence of peer pressure to maintain harmony and consensus among 18- to 20-year-old university students in the US, whether in full class, small group, or one-on-one discussion of each other's writing. In addition, it should be noted that proper training is important before having learners do peer review. Teachers should explain the purpose of peer review and let learners know that their responsibility is to offer honest feedback in an effort to help their peers. In this way, learners may feel less pressure while pointing out problems in their peers' writing.

       The fact that most learners in this study found FFPR helpful suggests that a concern for harmony did not prevent the activity from being productive. Most learners had positive attitudes toward peer review in general and acknowledged its value in helping them to revise subsequent drafts. Many suggested that they would like to do CMPR first and then have face-to-face discussion with a peer. By doing so, they could read and comment on each other's draft at their own pace and also have a chance to ask questions and clarify ideas. They saw a combination of the two modes as a way to make peer review activities more efficient and effective.
Several pedagogical implications can be drawn for EFL writing instructors in Taiwan, especially for those teaching at universities of science and technology. CMPR should not be used alone in the writing class due to its main limitation: lack of oral communication. Since peer review is a highly interactive activity, oral discussion is more efficient than written communication. Its advantage is clear even if such discussion should take place in the learners' L1. However, in light of comments from the learners as to their preference for speaking Chinese in class—a finding that appears to reflect a more general tendency of Taiwanese learners to favor the use of Chinese in English classes (Wang, 2002)—classroom research is needed to understand the reasons for and the extent of Chinese language use and to identify ways in which more advanced-level learners, in particular, can be encouraged to speak English. Teachers might consider combining both FFPR and CMPR to make peer review sessions more productive. For example, since time constraints are an issue common to many classes, teachers could have learners do CMPR outside of classroom and then allow time for face-to-face sessions during regular class hours.

       This study is not without limitations. First, all the participants were from the same national university of science and technology. The small sample size does not allow generalizations to EFL learners in universities throughout Taiwan. Research with a larger sample drawn from different universities is needed to confirm our findings. Second, learners' responses elicited from a questionnaire with Likert-type items and open-ended questions may or may not be as accurate or complete as those gathered by means of in-depth face-to-face interviews. Third, since the participants were recruited from two classes taught by different teachers, there is a possibility that learners' perceptions of both FFPR and CMPR were influenced by the instructional objectives and styles of their teacher.
Future research on peer review in EFL settings could well examine how learners' perceptions toward both face-to-face and computer-mediated peer review are affected by such variables as teaching style, assignment types, learners' age, and English learning experience. In order to reap the benefits of a process approach to writing, can they learn to focus on the global features of a text, things like content, organization, and coherence, as well as on the more familiar sentence-level grammatical structure? In addition, since the findings of the present study suggest that both FFPR and CMPR are best used together, future research could investigate the advantages of various combinations of the two modes. Given the communicative nature of peer review, by documenting learner interactions in both face-to-face and computer-mediated sessions, future research could also explore how students negotiate meaning.

The present study yields encouraging results. It shows peer review to be a highly communicative language activity that can be used successfully in an EFL context in Taiwan. The learners in this study not only had favorable attitudes toward the experience, they found peer review helped them with their writing. These findings do not support the suggestion that peer review may not work well for learners with a Chinese cultural background (Carson & Nelson 1996; 1998). Moreover, research findings related to learners in ESL contexts might not be an accurate representation of peer review in EFL contexts. Although the learners in this study reported experiencing pressure in pointing out problems in one another's writing, the advantages offered by peer review activity in general seemed to outweigh the drawbacks. Peer review appears to be a means of increasing learner communication in writing classes, offering ideas and strategies for revision, and promoting a sense of discourse community (Grabe & Kaplan, 1996; Nelson & Murphy, 1992; Spear, 1987). Most important, peer review may reduce learners' apprehension of writing in a foreign language and increase their confidence as EFL writers.

NOTES
1 The Norton Textra Connect software supports file sharing, discussion, editing of word-processed documents inside learners' word processor. It has both real-time and asynchronous discussion features, private messaging, and group talk.
2 These 2-year programs follow a 5-year junior college program (a combination of high school and the first 2 years of college). A detailed description of these 2-year programs and of their English language goals is provided in the discussion of the research design that follows. The appendix to this article outlines the formal education system in Taiwan.
3 Email exchanges between the researchers and the teachers are identified by teacher.

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