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2020 Fiscal Year Research-status Report

A usage-based approach to understanding L2 learners' knowledge of English affixes

Research Project

Project/Area Number 20K00898
Research InstitutionTokyo University of Science

Principal Investigator

スチュワート ジェフリー  東京理科大学, 理学部第一部教養学科, 准教授 (40536306)

Co-Investigator(Kenkyū-buntansha) Mclean Stuart  桃山学院大学, 経営学部, 講師 (10624794)
ステクル ティモシー  新潟県立大学, 国際地域学部, 教授 (40601711)
Brown Dale  金沢大学, 外国語教育系, 准教授 (50781168)
ベネット フィリップ  新潟県立大学, 国際地域学部, 准教授 (70601714)
バティ アーロン  慶應義塾大学, 看護医療学部(藤沢), 准教授 (80406686)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsvocabulary / derivations / affixes / word families
Outline of Annual Research Achievements

Thus far, we have selected affixes for investigation after identifying their frequencies in English. These affixes will form the basis of our research. We then obtained a lemma-based wordlist with a good correlation to Japanese learners' vocabulary knowledge, identified all lemmas in the first 11,000 lemmas of that wordlist that contain each of the selected affixes, identified the headwords of those affixed forms and selected items for testing each the affixes as they appear in various combinations across several derivations. Going through this lemma list of 11,000 words one by one and cataloguing the various affixes they contain took the bulk of our time this year.
Next, We began writing test items to assess knowledge of these derivations. In many cases these derivations contain affixes which will in many cases be beyond the vocabulary levels of many learners within our sample, but which have headwords clearly within their vocabulary level, thereby helping reveal learners’ comprehension of affixes used in derivations, and learners' ability to deduce the meanings of derivations using knowledge of affixes.
The coronavirus crisis of 2020 consumed much of our time last year as we struggled to adjust to sudden changes at our institutions, causing a delay in the item-writing step. Therefore, the writing of the items is still ongoing.

Current Status of Research Progress
Current Status of Research Progress

3: Progress in research has been slightly delayed.

Reason

Currently, we are completing the writing of items, and preparing to pilot the items with 30 learners who will take the entire set, with the goal of checking their quality and revising problematic ones. However, the current state of emergency regarding the coronavirus is slowing this process. It is difficult to conduct the pilot research with students given the current strict restrictions on on-campus student activity.

Strategy for Future Research Activity

After piloting the items, for our next step we will prepare a final test to determine learner vocabulary level. Our plan has been for 600 learners across five institutions to each take a sub-set of 50 items. And a group of 130 learners to take all items and act as anchors. However, coronavirus restrictions could greatly delay this process if universities are not fully reopened without restrictions by Fall of 2021. This could impact the time required to collect data and the size of the sample.

Causes of Carryover

The coronavirus crisis of 2020 greatly hampered our research and travel plans for 2020. We hope to make full use of these funds after vaccinations are completed, the crisis lifts and we are able to freely research and travel again.

  • Research Products

    (5 results)

All 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Using confidence intervals to determine adequate item sample sizes for vocabulary tests: An essential but overlooked practice2021

    • Author(s)
      Gyllstad, H., McLean, S. & Stewart, J.
    • Journal Title

      Language Testing

      Volume: 38 (4) Pages: 558-579

    • DOI

      10.1177/0265532220979562

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Predicting L2 reading proficiency with modalities of vocabulary knowledge: A bootstrapping approach2020

    • Author(s)
      Mclean, S., Stewart, J. & Batty, A.
    • Journal Title

      Language Testing

      Volume: 37 Pages: 389-411

    • DOI

      10.1177/0265532219898380

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Most Appropriate Lexical Unit for L2 Vocabulary Research and Pedagogy: A Brief Review of the Evidence2020

    • Author(s)
      Brown, D., Stoeckel, T., Mclean, S. & Stewart, J.
    • Journal Title

      Applied Linguistics

      Volume: NA Pages: NA

    • DOI

      10.1093/applin/amaa061

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Predicting L2 reading proficiency with modalities of vocabulary knowledge: A bootstrapping approach2020

    • Author(s)
      Stewart, J.
    • Organizer
      2020 Conference of the American Association for Applied Linguistics (AAAL)(Conference Cancelled)
    • Int'l Joint Research
  • [Presentation] Forms of Vocabulary Knowledge and Reading Ability2020

    • Author(s)
      Stewart, J.
    • Organizer
      JALT 2020 International Conference
    • Int'l Joint Research

URL: 

Published: 2021-12-27  

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