可靠性(半导体)
心理学
词汇多样性
任务(项目管理)
有效性
认知心理学
多样性(政治)
语言学
索引(排版)
词根(语言学)
计算机科学
自然语言处理
心理测量学
发展心理学
社会学
工程类
功率(物理)
物理
哲学
量子力学
词汇
人类学
万维网
系统工程
作者
Kristopher Kyle,Hakyung Sung,Masaki Eguchi,Fred Zenker
标识
DOI:10.1017/s0272263123000402
摘要
Abstract 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’s index) and D (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 D is reliable across different text lengths. However, support for the reliability and validity of optimized versions of MATTR and MTLD was found.
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