{"id":12693,"date":"2023-09-25T11:32:12","date_gmt":"2023-09-25T21:32:12","guid":{"rendered":"https:\/\/www.hawaii.edu\/sls\/?p=12693"},"modified":"2023-10-25T17:24:40","modified_gmt":"2023-10-26T03:24:40","slug":"phd-student-fred-zenker-paper-in-studies-in-second-language-acquisition","status":"publish","type":"post","link":"https:\/\/www.hawaii.edu\/sls\/phd-student-fred-zenker-paper-in-studies-in-second-language-acquisition\/","title":{"rendered":"Newly Published Article: Ph.D. Student Fred Zenker and colleagues"},"content":{"rendered":"
\"photo
Fred Zenker<\/figcaption><\/figure>\n

Ph.D. Student Fred Zenker and colleagues who were formerly at UHM recently wrote a paper that was released in Studies in Second Language Acquisition.<\/em><\/p>\n

Title:<\/strong> Evaluating evidence for the reliability and validity of lexical diversity indices in L2 oral task responses<\/p>\n

Abstract: <\/strong><\/p>\n

Although lexical diversity is often used as a measure of productive proficiency (e.g., as an aspect of lexical complexity) in SLA studies involving oral tasks, relatively little research has been conducted to support the reliability and\/or validity of these indices in spoken contexts. Furthermore, SLA researchers commonly use indices of lexical diversity such as Root TTR (Guiraud\u2019s index) and\u00a0<\/span>D<\/span>\u00a0(vocd-D and HD-D) that have been preliminarily shown to lack reliability in spoken L2 contexts and\/or have been consistently shown to lack reliability in written L2 contexts. In this study, we empirically evaluate lexical diversity indices with respect to two aspects of reliability (text-length independence and across-task stability) and one aspect of validity (relationship with proficiency scores). The results indicated that neither Root TTR nor\u00a0<\/span>D<\/span>\u00a0is reliable across different text lengths. However, support for the reliability and validity of optimized versions of MATTR and MTLD was found.<\/span><\/p>\n

\n
\n
Kyle, K., Sung, H., Eguchi, M., & Zenker, F. (2023).\u00a0<\/span>Evaluating evidence for the reliability and validity of lexical diversity indices in L2 oral task responses.\u00a0Studies in Second Language Acquisition<\/i>, 1-22.\u00a0<\/span>https:\/\/doi.org\/10.1017\/S0272263123000402<\/a><\/div>\n<\/div>\n<\/div>\n
<\/div>\n
<\/div>\n
Awesome work, Fred, Kristopher, Masaki, and Hakyung! Congratulations!<\/strong><\/div>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"
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\nPh.D. Student Fred Zenker and colleagues who were formerly at UHM recently wrote a paper that was released in Studies in Second Language Acquisition. Title: Evaluating evidence for the reliability and validity of lexical diversity indices in L2 oral task…\n<\/div>\n
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