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Commentary: ‘‘I Don’t Know’’ Use and Guessing on the Bilingual Japanese Vocabulary Size Test: Clarifications and Limitations

This paper offers a response to Hutchinson’s comments on our preliminary report of ‘‘I don’t know’’ use and guessing on the bilingual Japanese Vocabulary Size Test (VST), which was published in Vocabulary Learning and Instruction. In particular, it provides greater clarification of the English proficiency levels used throughout that paper and a reiteration of what we see as its key findings regarding the range of vocabulary size estimates that were able to be calculated for the participants. Finally, it addresses the methodological limitations of the original study, which, we believe, reduce any determinations about the participants’ personality types or general test-taking behaviors to mere speculation.