Research projects
BATTY, Aaron Olaf
1-2 items (total 2)
2012.04 - 2014.03
An Objective Test of Communicative English Proficiency
- Researcher
- BATTY, Aaron Olaf; STEWART, Jeffrey
- Research Category
- Grant-in-Aid for Challenging Exploratory Research
学力検査 / 言語試験 / 英語教育 / スピーキング伝達能力
2020.04 - 2025.03
A usage-based approach to understanding L2 learners’ knowledge of English affixes
- Providing Institution
- Japan Society for the Promotion of Science (JSPS)
- Program Name
- Grant-in-Aid for Scientific Research C
- Research Institution
- Japan Society for the Promotion of Science (JSPS)
- Funding Type
- Competitive
- International Co-authorship
- No
- Role
- Coinvestigator(s)
- Researcher
- STEWART, Jeffrey; McLEAN, Stuart; STOEKEL, Timothy; BROWN, Dale; BENNETT, Phillip; BATTY, Aaron Olaf
- Research Funding Type
- Research grant
- Submission Category
- Intramural joint research
- Remarks
- 447 learners were tested on the 1001 selected derivations and basewords, in addition to 330 words used as a vocabulary size measure. The first 153 learners were tested on the entire set of 1331 words in total. The remainder were tested on segments of words that were linked and equated to the main dataset under IRT. Analysis under Many Facet Rasch Measurement indicated that the tested affixes varied greatly in difficulty and that it is possible to track the likelihood derivations are known given learner vocabulary size, affix difficulty and mean baseword difficulty per derivation type. Additionally, in a linear regression two of the examined usage-based metrics (Affix frequency and Relative Entropy) had statistically significant contributions to predicting derivation difficulty. In addition to answering the research questions laid out for the current project, the resulting dataset will be a valuable resource for examining difficulty of English derivations for subsequent studies.