Research theme for competitive and other funds (1)：
2015 - 2019 Unproductive Gaps between Text Readability and Japanese Students' Reading Abilities: The Effect of the Gaps on Class Activities
Papers (10)：
Etsuko Ota. Grammatical Developments Observed in Japanese Senior High School Learners' English Writing: Focusing on Use of the Basic Grammar Introduced in Junior High School. HAKUSAN-EIBEIBUNGAKU. 2021. 46. 15-41
Etsuko Ota. Unproductive Gaps between Text Readability and Japanese Students' Reading Abilities: The Effect of the Gaps on In-class Activities. HAKUSAN-EIBEIBUNGAKU. 2019. 44. 55-82
Etsuko Ota. Comparison of Textbook Difficulty in JHS and SHS English Textbooks in the Former and the Current Course of Study - Text Difficulty in Transitions between JHS and SHS Textbooks-. 2017. 42. 19-41
Comparison of Text Difficulty of JHS and SHS English Textbooks with Lexile Framework. 2016. 41. 1-20
Etsuko Ota. Measuring Text Difficulty of High-School English Textbooks with the Lexile Framework - A Comparison of Engish Communication I and English I. HAKUSAN-EIBEIBUNGAKU. 2015. 40. 41-56
