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How can corpora help in language pedagogy? Richard.Xiao @edgehill.ac .uk

How can corpora help in language pedagogy?

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How can corpora help in language pedagogy?. Richard.Xiao @edgehill.ac.uk. Corpus revolution. An increasing interest since the early 1990s in applying the findings of corpus-based research to language pedagogy - PowerPoint PPT Presentation

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Page 1: How can corpora help in  language pedagogy?

How can corpora help in language pedagogy?

[email protected]

Page 2: How can corpora help in  language pedagogy?

Corpus revolution• An increasing interest since the early 1990s in applying the

findings of corpus-based research to language pedagogy– 8 well-received biennial international conferences Teaching and

Language Corpora (TaLC, 1994-2008)– At least 25 authored or edited books, covering a wide range of

issues concerning the use of corpora in language pedagogy, e.g. corpus-based language description, corpus analysis in classroom, and learner corpus research

• Wichmann et al (1997), Partington (1998), Bernardini (2000), Burnard and McEnery (2000), Kettemann and Marko (2002, 2006), Aston (2001), Ghadessy, Henry, and Roseberry (2001), Hunston (2002), Granger et al (2002), Connor and Upton (2002), Tan (2002), Sinclair (2003, 2004), Aston et al (2004), Mishan (2005), Nesselhauf (2005), Römer (2005), Braun, Kohn and Mukherjee (2006), Gavioli (2006), Scott and Tribble (2006), Hidalgo, Quereda and Santana (2007), O’Keeffe, McCarthy and Carter (2007), Aijmer (2009), and Campoy, Gea-valor and Belles-Fortuno (2010)

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Page 3: How can corpora help in  language pedagogy?

Teaching and corpora: A convergence

• Leech’s (1997) three focuses of the convergence– Indirect use of corpora in teaching (e.g. reference

publishing, materials development, language testing, and teacher training)

– Direct use of corpora in teaching (e.g. teaching about, teaching to exploit, and exploiting to teach)

– Development of teaching-oriented corpora (e.g. LSP and learner corpora)

• Corpus analysis can be illuminating ‘in virtually all branches of linguistics or language learning’ (Leech 1997: 9)

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Direct vs. indirect uses• Indirect uses

– Largely relating to what to teach

• Direct uses– Primarily concerning how to teach

• Development of teaching oriented corpora– Can relate to both

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Page 5: How can corpora help in  language pedagogy?

Reference publishing• Corpus revolution (at least for English)

– Nearly unheard of for dictionaries and reference grammars published since the 1990s not to claim to be based on corpus data

– Even people who have never heard of a corpus are using the product of corpus research

• Changes brought about by corpora to dictionaries and other reference books - five “emphases” (Hunston 2002)– an emphasis on frequency– an emphasis on collocation and phraseology– an emphasis on variation– an emphasis on lexis in grammar– an emphasis on authenticity

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Page 6: How can corpora help in  language pedagogy?

Corpus-based dictionaries• Learner dictionaries (defining vocabulary, collocation,

frequency bands, authentic examples)– Collins COBUILD English Dictionary (First fully corpus-based

dictionary)– Longman Dictionary of Contemporary English (LDOCE, 3rd

ed.)– Oxford Advanced Learner’s Dictionary (OALD, 5th ed.)– Cambridge International Dictionary of English (CIDE, 1st ed.)

• Frequency dictionaries defining core vocabulary for learners

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Page 8: How can corpora help in  language pedagogy?

Corpus-based reference grammars• Increasing consensus that non-corpus-based grammars can

contain biases while corpora can help to improve grammatical descriptions (cf. Mcenery and Xiao 2005)

• Longman Grammar of Spoken and Written English (Biber et al 1999)– A new milestone following Quirk et al’s (1985) A Comprehensive

Grammar of the English Language– Based entirely on the 40M-word Longman Spoken and Written

English Corpus– Illustrated throughout with real corpus examples– Taking account of register variations– Exploring the differences between spoken and written grammars– Including lexical information as an integral part of grammatical

descriptions

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Page 9: How can corpora help in  language pedagogy?

Corpus-based grammars• Collins COBUILD series: flatly rejecting the distinction

between lexis and grammar• Collins COBUILD English Grammar (Sinclair 1990)• Collins COBUILD English Usage (Sinclair 1992)• Collins COBUILD Grammar Patterns 1: Verbs (Francis et al 1996)• Collins COBUILD Grammar Patterns 2: Nouns and Adjectives (Francis et

al 1998)

• Pattern Grammar (Hunston and Francis 2000)• Focusing on the connection between pattern and meaning• Particularly useful in language learning because it provides ‘a resource

for vocabulary building in which the word is treated as part of a phrase rather than in isolation’ (Hunston 2002: 106)

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Page 10: How can corpora help in  language pedagogy?

Syllabus design and materials development • Previous research has demonstrated that the use of

grammatical structures in TEFL textbooks differs considerably from the use of these structures in native English– ‘a kind of school English which does not seem to exist

outside the foreign language classroom’ (Mindt 1996: 232)• The order in which those items are taught in non-corpus-

based syllabi ‘very often does not correspond to what one might reasonably expect from corpus data of spoken and written English’ (ibid: 245-6)

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Syllabus design and materials development • Corpora can be useful in this area - a simple yet

important role of corpora in language teaching is to provide more realistic examples of language usage reflecting the nuances and complexities of natural language

• Corpora can also provide data, especially frequency data, which may further impact on what is taught, and in what order

• Touchstone book series (McCarthy et al 2005-2006)– Based on the Cambridge International Corpus– Aiming at presenting the vocabulary, grammar, and language

functions that students encounter most often in real life

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Page 12: How can corpora help in  language pedagogy?

Syllabus design and materials development • Hunston (2002: 189): ‘The experience of using corpora

should lead to rather different views of syllabus design.’• The Lexical Syllabus (Willis 1990), as implemented in the

Collins COBUILD English Course (Willis, Willis and Davids 1988-1989)– Three focuses of a lexical syllabus: ‘(a) the commonest word

forms in a language; (b) the central patterns of usage; (c) the combinations which they usually form’ (Sinclair and Renouf 1988)

– Not a syllabus for vocabulary items only, but rather covering ‘all aspects of language, differing from a conventional syllabus only in that the central concept of organization is lexis’ (Hunston 2002: 189)

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Page 13: How can corpora help in  language pedagogy?

Language testing• An emerging area of language teaching which has started

to use the corpus-based approach• Alderson (1996) envisaged the following possible uses of

corpora in language testing– test construction, compilation and selection, test

presentation, response capture, test scoring, and calculation and delivery of results

– ‘The potential advantages of basing our tests on real language data, of making data-based judgments about candidates’ abilities, knowledge and performance are clear enough. A crucial question is whether the possible advantages are born out in practice’ (Alderson 1996: 258-259)

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Page 14: How can corpora help in  language pedagogy?

Language testing• The concern raised in Alderson’s conclusion appears to

have been addressed satisfactorily 10 years later– Nowadays, computer-based tests are considered to be comparable to

paper-based tests (cf. Choi, Kim and Boo 2003), as exemplified by computer-based versions of TOFEL tests

• Major test service providers like UCLES have recently used corpora in testing (cf. Ball 2001; Hunston 2002: 205)– As an archive of examination scripts– To develop test materials– To optimize test procedures– To improve the quality of test marking– To validate tests– To standardize tests

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Page 15: How can corpora help in  language pedagogy?

Teacher development• Corpora have been used recently in language teacher

training to enhance teachers’ language awareness and research skills – Rationale: For students to benefit from the use of corpora,

teachers must first of all be equipped with a sound knowledge of the corpus-based approach

• The integration of corpus studies in language teacher training is only a quite recent phenomenon (cf. Chambers 2007)– It may take more time, and ‘perhaps a new generation of

teachers, for corpora to find their way into the language classroom’ in secondary education (Braun 2007: 308)

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Page 16: How can corpora help in  language pedagogy?

Direct uses of corpora• Leech’s (1997) three direct uses of corpora in teaching

– 1) Teaching about• Teaching corpus linguistics as an academic subject

– Part of the curricula for linguistics and language related degree programs at both postgraduate and undergraduate level

– 2) Teaching to exploit• Providing students with ‘hands-on’ know-how so that they can

exploit corpora as student-centred learning activities

– 3) Exploiting to teach• Using the corpus-based approach to teaching language and

linguistics courses, which would otherwise be taught using non-corpus-based methods

• (1) and (3) are mainly associated with language / linguistics programmes

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From three P’s to three I’s• The traditional three-P approach

– Presentation – Practice – Production

• The exploratory three-I approach (cf. Carter and McCarthy 1995)– Illustration: looking at real data – Interaction: discussing and sharing opinions and

observations– Induction: making one’s own rule for a particular

feature, which ‘will be refined and honed as more and more data is encountered’ (ibid 1995: 155)

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Page 18: How can corpora help in  language pedagogy?

Data-driven learning (DDL)• Direct use of corpora in pedagogy is essentially DDL • Johns (1991): ‘research is too serious to be left to the

researchers’– The language learner should be encouraged to become ‘a

research worker whose learning needs to be driven by access to linguistic data’ (Johns 1991)

• Johns (1997: 101) compares the learner to a language detective: ‘Every student a Sherlock Holmes!’

• His DDL website gives some very good examples of data-driven learning– www.eisu2.bham.ac.uk/johnstf/timeap3.htm

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Page 19: How can corpora help in  language pedagogy?

Data-driven learning (DDL)• The DDL approach involves three stages of inductive

reasoning with corpora (Johns 1991)– Observation (of concordanced evidence)– Classification (of salient features) – Generalization (of rules)

• Roughly corresponding to Carter and McCarthy’s (1995) three I’s in the exploratory corpus-based approach, but fundamentally different from the traditional three-P approach– Three-P approach: top-down deduction– Three-I / DDL approach: bottom-up induction

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Page 20: How can corpora help in  language pedagogy?

Data-driven learning (DDL)• Can be either teacher-directed or learner-led (i.e. ‘discovery

learning’) to suit the needs of learners at different levels, but basically learner-centred• Leech (1997: 10): The autonomous learning process ‘gives the student

the realistic expectation of breaking new ground as a “researcher”, doing something which is a unique and individual contribution’

• This is true of advanced learners only!

• The key to successful data-driven learning is the appropriate level of pedagogical mediation depending on the learners’ age, experience, and proficiency level, etc• ‘A corpus is not a simple object, and it is just as easy to derive

nonsensical conclusions from the evidence as insightful ones’ (Sinclair 2004: 2)

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Page 21: How can corpora help in  language pedagogy?

Direct uses: Current situation• So far confined largely to learning at more advanced

levels, especially in tertiary education• Almost absent in general ELT classroom, e.g.

secondary education (and in the teaching of other foreign languages at all levels)– Learners’ age, level and experience– Time constraints and curricular requirements– Knowledge and skills required of teachers for corpus analysis

and pedagogical mediation– Access to appropriate resources such as corpora and tools– …or indeed probably a combination of all of these factors

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Page 22: How can corpora help in  language pedagogy?

LSP corpora vs. professional communication• Third focus of convergence: Development of teaching-

oriented corpora: LSP, parallel, and learner corpora• Teaching of language for specific purposes and professional

communication can benefit greatly from domain- or genre-specific specialized corpora both directly and indirectly, e.g.– Coxhead’s (2000) Academic Word List (AWL)– Biber’s (2006) comprehensive analysis of university language based on

the TOEFL 2000 Spoken and Written Academic Language Corpus– McCarthy and Handford’s (2004) exploration of pedagogical

implications regarding spoken business English on the basis of the Cambridge and Nottingham Spoken Business English Corpus (CANBEC)

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Page 23: How can corpora help in  language pedagogy?

Parallel concordancing

• Multilingual parallel corpora and parallel concordancing are useful in translation teaching

• They can also aid the so-called ‘reciprocal learning’ (Johns 1997) – i.e. two language learners with different L1

backgrounds are paired to help each other learn their language

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Page 24: How can corpora help in  language pedagogy?

Learner corpora• Welcomed as one of the most exciting recent

developments in corpus-based language studies• For indirect use, they have been explored to inform

curriculum design, materials development and teaching methodology (cf. Keck 2004)

• For direct use, they provide a bottom-up approach to language teaching - as opposed to the top-down approach with native corpora of the target language (Osborne 2002)

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Page 25: How can corpora help in  language pedagogy?

Learner corpora• Can also provide indirect, observable, and empirical

evidence for the invisible mental process of language acquisition and serve as a test bed for hypotheses generated using the psycholinguistic approach

• Provide an empirical basis enabling the findings previously made on the basis of limited data of a small number of informants to be generalized

• Have widened the scope of SLA research so that interlanguage research nowadays treats learner performance data in its own right rather than as decontextualised errors in traditional error analysis (cf. Granger 1998: 6)

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Page 26: How can corpora help in  language pedagogy?

Using CCL to inform SLA• Introducing Contrastive Corpus Linguistics (CCL)

• Presenting a brief summary of the relevant findings in a corpus-based contrastive study of passives in English and Chinese (Xiao, McEnery and Qian 2006)

• Exploring passives in the Chinese learner English Corpus (CLEC) in comparison with a comparable native English corpus

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Page 27: How can corpora help in  language pedagogy?

Contrastive corpus linguistics• Contrastive analysis

– Recognised as an important part of foreign language teaching methodology following WWII

– Dominant throughout the 1960s– But soon lost ground to more learner-oriented approaches

such as error analysis, performance analysis and interlanguage analysis

– Revived in the 1990s• …largely thanks to the advances in the corpus methodology, which

is inherently comparative in nature

• Contrastive Corpus Linguistics brings together the strengths of contrastive analysis and corpus analysis

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Page 28: How can corpora help in  language pedagogy?

Contrastive corpus linguistics• Parallel vs. comparable corpora

– Parallel corpus: source texts plus translations– Comparable corpus: different native languages

sampled with comparable sampling criteria and similar balance

• Can parallel corpora be used in contrastive studies?– ‘translation equivalence is the best available basis of

comparison’ (James 1980: 178)– ‘studies based on real translations are the only sound

method for contrastive analysis’ (Santos 1996: i)

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Page 29: How can corpora help in  language pedagogy?

Contrastive corpus linguistics• Translated language is merely an unrepresentative

special variant of the target native language which is perceptibly influenced by the source language...unreliable for contrastive analysis if relied upon alone – Baker 1993, Gellerstam 1996, Teubert 1996, Laviosa 1997,

McEnery and Wilson 2001, McEnery and Xiao 2002, McEnery and Xiao 2007, Xiao and Yue 2009

• In contrast, comparable corpora are well suited for contrastive study as they are unaffected by translationese

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Page 30: How can corpora help in  language pedagogy?

Interlanguage 1 Interlanguage 2 Interlanguage 3 Interlanguage 4

InterlanguageNative language L1 Target language L2

Cross-linguistic contrast

Contrastive corpus linguistics

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L1 transfer under- or overuse

cross-linguistic contrast of native languages

common features of SLA process

Page 31: How can corpora help in  language pedagogy?

Comparable corpora in this study• Two English corpora

– Freiburg-LOB (FLOB)– BNCdemo (4 M words of conversations)

• Two Chinese corpora– Lancaster Corpus of Mandarin Chinese (LCMC)– LDC CallHome Mandarin Transcripts: 300K words

• English and Chinese data are comparable in compositions and sampling periods– Providing a reliable basis for the cross-linguistic contrast of

passives in the two languages

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Page 32: How can corpora help in  language pedagogy?

English vs. Chinese passives (1)• Ten times as frequent in

English as in Chinese– Dynamicity– Pragmatic meaning– Different habitual tendency– Unmarked notional

passives• Chinese learners of

English are very likely to underuse passives in their interlanguage

0

200

400

600

800

1000

1200

English Chinese

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Page 33: How can corpora help in  language pedagogy?

English vs. Chinese passives (2)• Passive formation

– English passives• Auxiliary be/get followed by a past participial verb

– Chinese passives• Passivised verbs do not inflect morphologically• Also the notion of auxiliary verbs is less salient in Chinese• Syntactic passives (e.g. bei, jiao, rang)• Lexical passives (e.g. ai, shou, zao)• Unmarked notional passive and topic sentences (topic + comment)• Special structures (e.g. disposal ba and predicative shi…de)

• Choice of correct auxiliaries and proper inflectional forms of passivised verbs can constitute a difficult area for Chinese learners to acquire English passives

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Page 34: How can corpora help in  language pedagogy?

English vs. Chinese passives (3)• Long vs. short passives• Short passives are predominant in English (over 90% in

speech and writing)– Often used as a strategy that allows one to avoid mentioning

the agent when it cannot or must not be mentioned• 3 out of 5 syntactic passive markers in Chinese (wei…suo,

jiao and rang) only occur in long passives• For bei and gei passives, proportions of short forms

(60.7% and 57.5% respectively) are significantly lower than in English– The agent must normally be spelt out at early stages of

Chinese, though the constraints have become more relaxed

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English vs. Chinese passives (4)• Chinese passives are more

frequently used with an inflictive meaning– Chinese passives were used at

early stages primarily for unpleasant or undesirable events (bei, “suffer”)

• Marking negative pragmatic meanings is not a basic feature of the English passive norm (be passives)– Get-passives sometimes

(37.7% of the time) refer to undesirable events

• Chinese learners are more likely to use English passives for undesirable situations

15.0%

51.5%

80.3%

37.8%

4.7% 10.7%

0%

20%

40%

60%

80%

100%

English be passives Chinese bei passives

Language

Perc

ent

Negative Neutral Positive

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Interlanguage of Chinese learners• CLEC (learn data): the Chinese Learner English Corpus

– One million words– Essays– Five proficiency levels (high school students and university

students)– Fully annotated with learner errors using a tagset of 61 error types

clustered in 11 categories• LOCNESS (control data): the Louvain Corpus of Native

English Essays– ca. 300,000 words– Essays– British A-Level children and British and American university

students• Roughly comparable in terms of task type, learner age

and sampling period

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Underuse of passives

Corpus Words Passives Frequency per 100K

words

LL score

p value

CLEC 1,070,602 9,711 907

LL=1235.6

1.d.f.

p<0.001LOCNESS 324,304 5,465 1,685

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Page 38: How can corpora help in  language pedagogy?

Long vs. short passives• As can be expected from the contrastive analysis, in

comparison with native English writing, long passives are more frequent in Chinese learner English – Long passives in CLEC

• 9.14%: 888 out of 9,711

– Long passives in LOCNESS• 8.44%: 461 out of 5,465

• ...the difference is marginal and not statistically significant– LL=2.184, 1 d.f., p=0.139

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Pragmatic meanings• Passives are more

frequently negative in Chinese learner English– CLEC

• Negative: 25.7%• Positive: 5.9%• Neutral: 68.4%

– LOCNESS• Negative: 16.8%• Positive: 4.4%• Neutral: 78.8%

– LL=7.4, 2 d.f., p=0.025• Consistent wit h earlier

finding (50.5% vs. 15%)

25.7% 16.8%

68.4% 78.8%

5.9% 4.4%

0%

20%

40%

60%

80%

100%

CLEC LOCNESS

Corpus

Per

cent

Positive

Neutral

Negative

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Passive errors vs. learner levels

0

50

100

150

200

250

ST2 ST3 ST4 ST5 ST6

Fre

qu

ency

per

200

,000

wo

rds

Learner level

Aux. errors

Misformation

Misuse

Underuse

All error types

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Error types vs. learner levels• Error types are associated with learner levels when the dataset is taken as

a whole– LL=51.774, 12 d.f., p<0.001

• But similar learner groups also show similar error types– ST2 >> ST3: statistically significant (LL=27.303, 3 d.f., p<0.001)– ST3 >> ST4: not significant (LL=6.955, 3 d.f., p=0.073)– ST4 >> ST5: statistically significant (LL=18.563, 3 d.f., p<0.001)– ST5 >> ST6: not significant (LL=6.987, 3 d.f., p=0.072)

ST2 ST3/ST4 ST5/ST6 (High (Junior/Senior (Junior/Senior

school non-English English majorstudents) major students) students)

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Underuse errors• Likely to be a result of L1 transfer, as can be predicted from

results of cross-linguistic contrast and confirmed by the learner-native corpus comparison

• Typically occur with verbs whose Chinese equivalents are not normally used in passives, e.g.– A birthday party will hold in Lily’s house. (ST2)– The woman in white called Anne Catherick. (ST5)

• Also occur under the influence of the Chinese topic sentence– The supper had done. (ST2) wanfan <*bei> zuo-hao le supper <*PASS> cook-ready ASP topic comment

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Misuse errors• 1) Intransitive verbs used in passives, e.g.

– A very unhappy thing was happened in this week. (ST2)– I was graduated from Zhongshan University (ST5)

• 2) Misuse of ergative verbs, e.g.– …the secince <sic science> is developed quickly (ST4)

• 3) Training transfer (overdone passive training in classroom instructions), e.g.– …many machine <sic machines> and appliance <sic appliances> are

used electricity as power (ST5)– Because they have been mastered everything of this job… (ST4)

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Misformation errors

• Possibly a result of L1 interference• Related to morphological inflections

– Passivised verbs do not inflect in Chinese

• Chinese learners tend to use uninflected verbs or misspelt past participles in passives, e.g.– His relatives can not stop him, because his choice is

protect by the laws. (ST6)– Since the People’s Republic of china <sic China> was

found on October 1, 1949… (ST2)

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Auxiliary errors• Related to omission and misuse of auxiliaries• A result of L1 interference

– Auxiliaries are not a salient linguistic feature in Chinese • Chinese is not a morphologically inflectional language

• Chinese learners tend to omit or misuse auxiliaries in passives, e.g.– In China, since the new China <sic was> established,

people’s life has goten <sic gotten> better and better. (ST3)

– I am not a smoker, but why do <sic are> we forced to be a second-hand smoker? (ST5)

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Case study summary• The learner’s performance in interlanguage can be

predicted and accounted for from the perspective of Contrastive Corpus Linguistics

• The integrated approach that combines contrastive analysis (CA) and contrastive interlanguage analysis (CIA) is an indispensable tool in SLA research– Granger (1998: 14): ‘if we want to be able to make firm

pronouncements about transfer-related phenomena, it is essential to combine CA and CIA approaches.’

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Corpus-based pedagogy: Today

• Currently, corpora appear to have played a more important role in helping to decide what to teach (i.e. indirect uses) than how to teach (i.e. direct uses)– Indirect uses of corpora seem to be well

established– Direct uses of corpora in teaching are largely

confined to tertiary education and are nearly absent in general language classroom

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From today to tomorrow• If corpora are to be further popularised to

more general language teaching context, there are two priorities in near future– Corpus linguists must create and facilitate access to

corpora that are pedagogically motivated, in both design and content, to meet pedagogical needs and curricular requirements so that corpus-based learning activities become an integral part, rather than an additional option, of the overall language curriculum

– Teachers should be provided, through pre-service training or continued professional development, with the required knowledge and skills for corpus analysis and pedagogical mediation of corpus-based learning activities

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Corpus-based pedagogy: Tomorrow

• If these two tasks are accomplished, it is my view that corpora will not only ‘revolutionize the teaching of grammar’ in the 21st century as Conrad (2000: 549) has predicted, they will also fundamentally change, with the aid of a new generation of teachers, the ways we approach language teaching, including both what is taught and how it is taught

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