Interactions Between Type of Instruction and Type of Language Feature: A Meta-Analysis

Language Learning

Volumn 60, Issue 2, 2010, Pages 263-308

  Spada, Nina ^a   Tomita, Yasuyo ^a  

^a UNIVERSITY OF TORONTO   (Canada)

Author keywords

Explicit implicit instruction; Explicit implicit knowledge; Instructed SLA; Meta analysis

Indexed keywords

EID: 77953976039     PISSN: 00238333     EISSN: 14679922     Source Type: Journal    
DOI: 10.1111/j.1467-9922.2010.00562.x     Document Type: Review

References (153)

1. Alanen R. Input enhancement and rule presentation in second language acquisition. Attention and awareness in foreign language learning and teaching 1995, 259-302. Schmidt R. Ed., Tech. Rep. No. 9; pp., Honolulu, University of Hawai'i, Second Language Teaching & Curriculum Center
2. Ammar A, Lightbown P M. Teaching marked linguistic structure: More about the acquisition of relative clauses by Arab learners of English. Investigation in instructed second language acquisition 2005, 167-198. Housen A, Pierrard M. Eds., Amsterdam, Mouton de Gruyter
3. Bardovi-Harlig K. Reverse-order reports and the acquisition of tense: Beyond the principle of chronological order. Language Learning 1994, 44:243-282.
4. Bardovi-Harlig K. A narrative perspective on the development of the tense/aspect system in second language acquisition. Studies in Second Language Acquisition 1995, 17:263-291.
5. Bardovi-Harlig K. Another piece of the puzzle: The emergence of the present perfect. Language Learning 1997, 47:375-422.
6. Bardovi-Harlig K. Narrative structure and lexical aspect: Conspiring factors in second language acquisition of tense-aspect morphology. Studies in Second Language Acquisition 1998, 20:471-508.
7. Bardovi-Harlig K. From morpheme studies to temporal semantics: Tense-aspect research in SLA. Studies in Second Language Acquisition 1999, 21:341-382.
8. Bardovi-Harlig K. Tense and aspect in second language acquisition: Form, meaning, and use 2000, Malden, MA, Blackwell
9. Bardovi-Harlig K. Analyzing aspect. The L1 acquisition of tense-aspect morphology 2002, 129-154. Salaberry RShirai Y. Eds., Amsterdam, Benjamins
10. Bardovi-Harlig K, Bergstom A. The acquisition of tense and aspect in SLA and FLL: A study of learner narratives in English (SL) and French (FL). Canadian Modern Language Review 1996, 52:308-330.
11. Bardovi-Harlig K, Raynolds D W. The role of lexical aspect in the acquisition of tense and aspect. TESOL Quarterly 1995, 29:107-131.
12. Benati A. The effects of processing instruction, traditional instruction and meaning-output instruction on the acquisition of the English past simple tense. Language Teaching Research 2005, 9(1):67-93.
13. Bitchener J, Young S, Cameron D. The effect of different types of corrective feedback on ESL student writing. Journal of Second Language Writing 2005, 14:191-205.
14. Bouton L F. Can CCS skill in interpreting implicature in American English be improved through explicit instruction? A pilot study. Pragmatics and Language Learning 1994, 5:89-109.
15. Cadierno T. Formal instruction from a processing perspective: An investigation into the Spanish past tense. Modern Language Journal 1995, 79:179-193.
16. Carroll S, Roberge Y, Swain M. The role of feedback in adult second language acquisition: Error correction and morphological generalization. Applied Psycholinguistics 1992, 13:173-189.
17. Carroll S, Swain M. Explicit and implicit negative feedback: An empirical study of the learning of linguistic generalizations. Studies in Second Language Acquisition 1993, 15(3):357-386.
18. Celce-Murcia M, Larsen-Freeman D. The grammar book 1999, Boston, Heinle & Heinle
19. Chan A Y W. An algorithmic approach to error correction: An empirical study. Foreign Language Annals 2006, 39(1):131-147.
20. Clachar A. Creole English speakers' treatment of tense-aspect morphology in English interlanguage written discourse. Lanugage Learning 2005, 55(2):275-334.
21. Collins L. The role of L1 influence and lexical aspect in the acquisition of temporal morphology. Language Learning 2002, 52(1):43-94.
22. Day E, Shapson S. Integrating formal and functional approaches to language teaching in French immersion: An experimental study. Language Learning 1991, 41:25-58.
23. de Graaff R. The eXperanto experiment: Effects of explicit instruction on second language acquisition. Studies in Second Language Acquisition 1997, 19:249-297.
24. DeKeyser R M. Learning second language grammar rules: An experiment with a miniature linguistic system. Studies in Second Language Acquisition 1995, 17:379-410.
25. DeKeyser R M. Beyond explicit rule learning: Automatizing second language morphosyntax. Studies in Second Language Acquisition 1997, 19:195-221.
26. DeKeyser R M. Beyond focus on form: Cognitive perspectives on learning and practicing second language grammar. Focus on form in classroom second language acquisition 1998, 42-63. Doughty CWilliams J. Eds., pp., Cambridge, Cambridge University Press
27. Doughty C, Williams J. Eds., Cambridge, Cambridge University Press
28. DeKeyser R M. Implicit and explicit learning. The handbook of second language acquisition 2003, 313-348. Doughty CLong M. Eds., Oxford, Blackwell
29. DeKeyser R M. What makes learning second-language grammar difficult? A review of issues. Language Learning 2005, 55(Suppl. 1):1-25.
30. DeKeyser R M, Sokalski K J. The differential role of comprehension and production practice. Language Learning 1996, 46:613-642.
31. Doughty C. Second language instruction does make a difference: Evidence from an empirical study of SL relativization. Studies in Second Language Acquisition 1991, 13:431-469.
32. Doughty C. Instructed SLA: Constraints, compensation, and enhancement. The handbook of second language acquisition 2003, 256-310. Doughty CLong M. Eds., Oxford, Blackwell
33. Doughty C, Varela E. Communicative focus on form. Focus on form in classroom second language acquisition 1998, 114-138. Doughty C, Williams J. Eds., Cambridge, Cambridge University Press
34. Doughty C, Williams J. Pedagogical choices in focus on form. Focus on form in classroom second language acquisition 1998, 197-261. Doughty C, Williams J. Eds., pp., Cambridge, Cambridge University Press
35. Ellis R. Instructed second language acquisition 1990, Oxford, Basil Blackwell
36. Ellis R. The structural syllabus and second language acquisition. TESOL Quarterly 1993, 27(1):91-113.
37. Ellis R. Investigating form-focused instruction. Language Learning 2001, 51:1-46.
38. Ellis R. Does form-focused instruction affect the acquisition of implicit knowledge? A review of the research. Studies in Second Language Acquisition 2002, 24:223-236.
39. Ellis R. Measuring implicit and explicit knowledge of a second language: A psychometric study. Studies in Second Language Acquisition 2005, 27:14-172.
40. Ellis R. Current issues in the teaching of grammar: An SLA perspective. TESOL Quarterly 2006a, 40(1):83-107.
41. Ellis R. Modeling learning difficulty and second language proficiency: The differential contributions of implicit and explicit knowledge. Applied Linguistics 2006b, 27(3):431-463.
42. Ellis R, Loewen S, Erlam R. Implicit and explicit corrective feedback and the acquisition of L2 grammar. Studies in Second Language Acquisition 2006, 28:339-368.
43. Ellis R, Rosszell H, Takashima H. Down the garden path: Another look at negative feedback. JALT Journal 1994, 16:9-24.
44. Fotos S, Ellis R. Communicating about grammar: A task-based approach. TESOL Quarterly 1991, 25(4):605-628.
45. Goldschneider J M, DeKeyser R M. Explaining the " natural order of L2 morpheme acquisition" in English: A meta-analysis of multiple determinants. Language Learning 2005, 55(Suppl. 1):27-77.
46. Gor K, Cherinigovskaya T. Formal instruction and the acquisition of verbal morphology. Investigation in instructed second language acquisition 2005, 131-164. Housen A, Pierrard M. Eds., New York, Mouton de Gruyter
47. Griggs P. Assessment of the role of communication tasks in the development of second language oral production skills. Investigation in instructed second language acquisition 2005, 407-432. Housen APierrard M. Eds., New York, Mouton de Gruyter
48. Han Z. A study of the impact of recasts on tense consistency in L2 output. TESOL Quarterly 2002, 36(4):543-572.
49. Harley B. Instructional strategies and SLA in early French immersion. Studies in Second Language Acquisition 1993, 15:245-259.
50. Hedges L V. Distribution theory for Glass's estimator of effect size and related estimators. Journal of Educational Statistics 1981, 6:107-128.
51. Herron C, Tomasello M. Learning grammatical structures in foreign language: Modelling versus feedback. The French Review 1988, 61:910-922.
52. Hinkel E. The past tense and temporal verb meanings in a contextual frame. TESOL Quarterly 1997, 31(2):289-313.
53. Housen A. The development of tense-aspect in English as a second language and the variable influence of inherent aspect. The L1 acquisition of tense-aspect morphology 2002, 155-197. Salaberry RShirai Y. Eds., Amsterdam, Benjamins
54. Housen A, Pierrard M, Van Daele S. Rule complexity and the efficacy of explicit grammar instruction. Investigations in instructed second language acquisition 2005, 235-269. Housen A, Pierrard M, . Eds., Amsterdam, Mouton de Gruyter
55. Hsu L M. Fail-safe Ns for one-versus two-tailed tests lead to different conclusions about publication bias. Understanding Statistics 2002, 1(2):85-100.
56. Hulstijn J H. Implicit and incidental second language learning: Experiments in the processing of natural and partly artificial input. Interlingual processes 1989, 49-73. Dechert H WRaupach M. Eds., Tubingen, Gunter Narr
57. Hulstijn J H. Not all grammar rules are equal: Giving grammar instruction its proper place in foreign language teaching. Attention and awareness in foreign language learning 1995, 359-386. Schmidt R. Ed., Honolulu, University of Hawai'i at Manoa
58. Hulstijn J H, de Graaff R. Under what conditions does explicit knowledge of a second language facilitate the acquisition of implicit knowledge? A research proposal. AILA Review 1994, 11:97-112.
59. Ionin T, Wexler K. Why is " Is" easier than " -s" ? Acquisition of tense/agreement morphology by child second language learners of English. Second Language Research 2003, 18(2):95-136.
60. Izumi S. Output, input enhancement, and the noticing hypothesis: An experimental study on ESL relativization. Studies in Second Language Acquisition 2002, 24:541-577.
61. Izumi S, Bigelow M. Does output promote noticing and second language acquisition. TESOL Quarterly 2000, 34(2):239-278.
62. Izumi S, Bigelow M, Fujiwara M, Fearnow S. Testing the output hypothesis: Effects of output on noticing and second language acquisition. Studies in Second Language Acquisition 1999, 21:421-452.
63. Izumi Y, Izumi S. Investigating the effects of oral output on the learning of relative clauses in English: Issues in the psycholinguistic requirements for effective output tasks. Canadian Modern Language Review 2004, 60(5):587-609.
64. Izumi S, Lakshmanan U. Learnability, negative evidence and the L2 acquisition of the English passive. Second Language Research 1998, 14(1):62-101.
65. Jourdenais R, Ota M, Stauffer S, Boyson B, Doughty C. Does textual enhancement promote noticing? A think-aloud protocol analysis. Attention and awareness in foreign language learning 1995, 182-216. Schmidt R, . Ed., Tech. Rep. No. 9; pp., Honolulu: University of Hawai'i, Second Language Teaching & Curriculum Center
66. Keck C M, Iberri-Shea G, Tracy-Ventura N, Wa-Mbaleka S. Investigating the empirical link between task-based interaction and acquisition: A meta-analysis. Synthesizing research on language learning and teaching 2006, 91-131. Norris J, Ortega L, . Eds., Amsterdam, Benjamins
67. Kihlstedt M. Reference to past events in dialogue: The acquisition of tense and aspect by advanced learners of English. The L1 acquisition of tense-aspect morphology 2002, 323-361. Salaberry RShirai Y. Eds., Amsterdam, Benjamins
68. Krashen S. Principles and practice in second language acquisition 1982, Oxford, Pergamon
69. Krashen S. The input hypothesis and its rivals. Implicit and explicit learning of languages 1994, 45-77. Ellis N. Ed., London, Academic Press
70. Kubota M. Accuracy order and frequency order of relative clauses as used by Japanese senior high school students of EFL. Institute for Research in Language Teaching Bulletin 1993, 7:27-53.
71. Kubota M. The role of negative feedback on the acquisition of the English dative alternation by Japanese college students of EFL. Institute for Research in Language Teaching Bulletin 1994, 8:1-36.
72. Kubota M. The Garden Path technique: Is it really effective. Working Papers of Chofu Gakuin Women's Junior College 1995a, 27:21-48.
73. Kubota M. Teachability of conversational implicature to Japanese EFL learners. Institute for Research in Language Teaching Bulletin 1995b, 9:35-67.
74. Kubota M. The effects of instruction plus feedback on Japanese university students of EFL: A pilot study. Bulletin of Chofu Gakuen Women's Junior College 1996, 18:59-95.
75. Kuiken F, Vedder I. The effect of interaction in acquiring the grammar of a second language. International Journal of Educational Research 2002, 37:343-358.
76. Lantolf J P, DiCamilla F J, Ahmed M K. The cognitive function of linguistic performance: Tense/aspect use by L1 and L2 speakers. Language Sciences 1997, 19:153-165.
77. Larsen-Freeman D, Kuehn T, Hacciuis M. Helping students make appropriate English verb tense-aspect choices. TESOL Journal 2002, 11(4):3-9.
78. Leow R P. Attention, awareness, and foreign language behavior. Language Learning 1997, 47:467-506.
79. Leow R P. The effects of amount and type of exposure on adult learners' L2 development in SLA. Modern Language Journal 1998a, 82:49-68.
80. Leow R P. Toward operationalizing the process of attention in SLA: Evidence for Tomlin and Willa's (1994) fine-grained analysis of attention. Applied Psycholinguistics 1998b, 19:133-159.
81. Lightbown P M. The acquisition and use of questions by French L2 learners. Second language development: Trends and issues 1980, 151-175. Felix S. Ed., Tubingen, Gunter Narr
82. Lipsey M, Wilson D. Practical meta-analysis 2001, London, Sage
83. Long M H, Inagaki S, Ortega L. The rule of implicit negative feedback in SLA: Models and recasts in Japanese and Spanish. Modern Language Journal 1998, 82:357-371.
84. Loschky L. Comprehensible input and second language acquisition: What is the relationship. Studies in Second Language Acquisition 1994, 16:303-323.
85. Lyster R. The effect of functional-analytic teaching on aspects of French immersion students' sociolinguistic competence. Applied Linguistics 1994, 15:263-287.
86. Mackey A. Input, interaction, and second language development: An empirical study on question formation in ESL. Studies in Second Language Acquisition 1999, 21:557-587.
87. Mackey A. Feedback, noticing and instructed second language learning. Applied Linguistics 2006, 27(3):405-430.
88. Mackey A, Goo J. Interaction research in SLA: A meta-analysis and research synthesis. Conversational interaction in second language acquisition: A series of empirical studies 2007, 407-452. Mackey A, . Ed., Oxford, Oxford University Press
89. Mackey A, Oliver R. Interactional feedback and children's L2 development. System 2002, 30:459-477.
90. Mackey A, Philp J. Conversational interaction and second language development: Recasts, responses, and red herrings. Modern Language Journal 1998, 82(3):338-356.
91. Master P. The effect of systematic instruction on learning the English article system. Perspectives on pedagogical grammar 1994, 229-252. Odlin T. Ed., Cambridge, Cambridge University Press
92. McDonough K. Learner-learner interaction during pair and small group activities in a Thai EFL context. System 2004, 32:207-224.
93. McDonough K. Identifying the impact of negative feedback and learners' responses on ESL question development. Studies in Second Language Acquisition 2005, 27:79-103.
94. McDonough K. Interaction and syntactic priming: English L2 speakers' production of dative constructions. Studies in Second Language Acquisition 2006, 28:179-207.
95. Meisel J, Clahsen H, Pienemann M. On determining developmental stages in natural second language acquisition. Studies in Second Language Acquisition 1981, 3:109-135.
96. Muranoi H. Focus on form through interaction enhancement: Integrating formal instruction into a communicative task in EFL classrooms. Language Learning 2000, 50(4):617-673.
97. Murphy V A. Dissociable systems in second language inflectional morphology. Studies in Second Language Acquisition 2004, 26(3):433-459.
98. Nagata N. Intelligent computer feedback for second language instruction. Modern Language Journal 1993, 77:330-339.
99. Nagata N. An effective application of natural language processing in second language instruction. CALICO Journal 1995, 13:47-67.
100. Nagata N. The effectiveness of computer-assisted metalinguistic instruction: A case study in Japanese. Foreign Language Annals 1997a, 30:187-200.
101. Nagata N. An experimental comparison of deductive and inductive feedback generated by a simple parser. System 1997b, 25:515-534.
102. Nagata N. Input vs. output practice in educational software for second language acquisition. Language Learning & Technology 1998, 1(2):23-40.
103. Nakamori T. Teaching relative clauses: How to handle a bitter lemon for Japanese learners and English teachers. ELT Journal 2002, 56(1):29-40.
104. Norris J, Ortega L. Effectiveness of L2 instruction: A research synthesis and quantitative meta-analysis. Language Learning 2000, 50:417-528.
105. Norris J, Ortega L. The value and practice of research synthesis for language learning. Synthesizing research on language learning and teaching 2006, 3-52. Norris J, Ortega L. Eds., Amsterdam, Benjamins
106. Nunan D. Linguistic theory and pedagogic practice. Perspectives on pedagogical grammar 1994, 253-270. Odlin T. Ed., Cambridge, Cambridge University Press
107. Orwin R G. A fail-safe N for effect size in meta-analysis. Journal of Educational Statistics 1983, 8(2):157-159.
108. Pienemann M. Is language teachable? Psycholinguistic experiments and hypothesis. Applied Linguistics 1989, 10:217-244.
109. Ravem R. Language acquisition in a second language environment. Focus on the learner 1973, 136-144. Oller JRichards J. Eds., Rowley, MA, Newbury House
110. Reber A S. Implicit learning and tacit knowledge. Journal of Experimental Psychology: General 1989, 118:219-235.
111. Robinson P. Learning simple and complex second language rules under implicit, incidental, rule-search and instructed conditions. Studies in Second Language Acquisition 1996, 18:27-67.
112. Robinson P. Generalizability and automaticity of second language learning under implicit, incidental, enhanced and instructed conditions. Studies in Second Language Acquisition 1997a, 19(2):233-247.
113. Robinson P. Individual differences and the fundamental similarity of implicit and explicit adult second language learning. Language Learning 1997b, 47:45-99.
114. Rohde A. The aspect hypothesis in naturalistic L2 acquisition: What uninflected and non-target-like verb forms in early interlanguage tell us. The L1 acquisition of tense-aspect morphology 2002, 199-220. Salaberry RShirai Y. Eds., Amsterdam, Benjamins
115. Rosenthal R. The " file-drawer problem" and tolerance for null results. Psychological Bulletin 1979, 86(3):638-641.
116. Rosenthal R. Meta-analytic procedures for social research 1991, Newbury Park, CA, Sage
117. Rosenthal R. Writing meta-analytic reviews. Psychological Bulletin 1995, 118(2):183-192.
118. Rosenthal R, Rosnow R L, Rubin D B. Contrasts and effect sizes in behavioral research: A correlational approach. 2000, Cambridge, Cambridge University Press
119. Salaberry M R. The role of input and output practice in second language acquisition. Canadian Modern Language Review 1997, 53:422-451.
120. Salaberry R. The acquisition of English in an instructional setting. System 2000, 28:135-152.
121. Salaberry R, Shirai Y. L2 acquisition of tense-aspect morphology. The L1 acquisition of tense-aspect morphology 2002, 1-20. Salaberry R, Shirai Y. Eds., Amsterdam, Benjamins
122. Schmidt R. The role of consciousness in second language learning. Applied Linguistics 1990, 11:129-158.
123. Schmidt R. Deconstructing consciousness in search of useful definitions for applied linguistics. AILA Review 1994, 11:11-26.
124. Schmidt R. Attention. Cognition and second language instruction 2001, 3-32. Robinson P. Ed., Cambridge, Cambridge University Press
125. Schumann J. The acquisition of English negation by speakers of Spanish: A review of the literature. The acquisition and use of Spanish and English as first and second languages 1979, 3-32. Andersen R. Ed., Washington, DC: TESOL
126. Schwartz B. On explicit and negative data effecting and affecting competence and linguistic behavior. Studies in Second Language Acquisition 1993, 15:147-162.
127. Scott V. An empirical study of explicit and implicit teacing strategies in French. Modern Language Journal 1989, 72:14-22.
128. Scott V. Explicit and implicit grammar teaching: New empirical data. The French Review 1990, 62:779-788.
129. Slabakova R, Montrul S. On viewpoint aspect interpretation and its L2 acquisition: A UG perspective. The L1 acquisition of tense-aspect morphology 2002, 363-395. Salaberry R, Shirai Y. Eds., Amsterdam, Benjamins
130. Spada N. Form-focused instruction and second language acquisition: A review of classroom and laboratory research. Language Teaching 1997, 30:73-87.
131. Spada N, Lightbown P M. Instruction and the development of questions in the L2 classroom. Studies in Second Language Acquisition 1993, 15:205-221.
132. Spada N, Lightbown P M. Instruction, first language influence, and developmental readiness in second language acquisition. Modern Language Journal 1999, 83(1):1-22.
133. Spada N, Lightbown P M. Form-focused instruction: Isolated or integrated. TESOL Quarterly 2008, 42(2):181-207.
134. Spada N, Lightbown P M, White J. The importance of form/meaning mappings in explicit form-focused instruction. Current issues in instructed second language learning 2005, 199-234. Housen A, Pierrard M, . Eds., Brussels, Mouton de Gruyter
135. Spada N, Tomita Y. The complexities of selecting complex (and simple) forms in instructed SLA research. Proceedings of the complexity, accuracy and fluency (CAF) conference 2008, 227-254. Housen A, Kuiken F. Eds., Belgium, University of Brussels
136. Takashima H, Ellis R. Output enhancement and the acquisition of the past tense. Learning a second language through interaction 1999, 173-188. Ellis R, . Ed., Amsterdam, Benjamins
137. Tickoo A. On the use of " then" /" after that" in the marking of chronological order: Insights from Vietnemese and Chinese learners of ESL. System 2002, 30:107-124.
138. Truscott J. The case against grammar correction in L2 writing classes. Language Learning 1996, 46:327-369.
139. Truscott J. What's wrong with oral grammar correction. Canadian Modern Language Review 1999, 55:437-456.
140. Vacha-Haase T, Thompson B. How to estimate and interpret various effect sizes. Journal of Counseling Psychology 2004, 51(4):473-481.
141. van Baalen T. Giving learners rules: A study into the effect of grammatical instruction with varying degrees of explicitness. Interlanguage Studies Bulletin Utrecht 1983, 7:71-100.
142. VanPatten B, Cadierno T. Explicit instruction and input processing. Studies in Second Language Acquisition 1993, 15:225-241.
143. VanPatten B, Oikkenon S. Explanation versus structured input in processing instruction. Studies in Second Language Acquisition 1996, 18:495-510.
144. VanPatten B, Sanz C. From input to output: Processing instruction and communicative tasks. SLA theory and pedagogy 1995, 169-185. Eckman F, Highland DLee PMileham JWeber R. Eds., Hillsdale, NJ, Erlbaum
145. White J. Adverb placement in second language acquisition: Some effects of positive and negative evidence in the classroom. Second Language Research 1991, 7:133-161.
146. White J, Ranta L. Examining the interface between metalinguistic task performance and oral production in a second language. Language Awareness 2002, 11(4):259-290.
147. White L, Spada N, Lightbown P M, Ranta L. Input enhancement and L1 question formation. Applied Linguistics 1991, 12:416-432.
148. Williams J, Evans J. What kind of focus and on which forms. Focus on form in classroom second language acquisition 1998, 139-155. Doughty C, Williams J. Eds., Cambridge, Cambridge University Press
149. Wode H. Developmental sequences in naturalistic L2 acquisition. Working Papers in Bilingualism 1976, 11:1-13.
150. Yang L, Givon T. Benefits and drawbacks of controlled laboratory studies of second language acquisition. Studies in Second Language Acquisition 1997, 19:173-194.
151. Yang S, Huang Y. The impact of the absence of grammatical tense in L1 on the acquisition of the tense-aspect system in L2. International Review of Applied Linguistics in Language Teaching 2004, 42(1):49-70.
152. Yip Y. Grammatical consciousness-raising and learnability. Perspectives on pedagogical grammar 1994, 123-139. Odlin T. Ed., Cambridge, Cambridge University Press
153. Zobl H. Grammars in search of input and intake. Input in SLA 1985, 329-344. Gass SMadden C. Eds., Rowley, MA, Newbury House