核心词汇测量的测量质量。
Quality of Measurement in Core Lexicon Measures.
机构信息
Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD.
Department of Psychology, East Carolina University, Greenville, NC.
出版信息
J Speech Lang Hear Res. 2022 Aug 17;65(8):2919-2930. doi: 10.1044/2022_JSLHR-20-00722. Epub 2022 Jul 19.
PURPOSE
Core lexicon measures have received growing attention in research. They are intended to provide clinicians with a clinician-friendly means to quantify word retrieval ability in discourse based on normal expectations of discourse production for specific discourse elicitation tasks. To date, different criteria have been used to develop core lexicon measures by groups of researchers. The need for statistical guidance in pursuit of the psychologically robust measure has been recognized.
AIMS
This study was to investigate the best criterion for accurate measurement. Specifically, we focused on two criteria ( vs. ) that have previously been used for the development of core lexicon measures.
METHOD
Core lexicon measures consisting of five different checklists by word class (verbs, nouns, adjectives, adverbs, and function words) and developed by the two criteria were applied to language samples produced by 470 cognitively healthy adults. Performance in word retrieval ability at the discourse level was modeled as a latent variable based on the observed proportions of the production of core lexicon items in two different sets of core lexicon measures using structural equation modeling.
RESULTS
Results indicated that both criterion for core lexicon measures capture word retrieval ability in discourse. Greater residual variances were found in the core lexicon measure established by the percentage criterion compared to the one established by the frequency criterion. This indicates that the measure based on the percentage criterion is more affected by measurement errors.
CONCLUSIONS
The findings provide evidence that the frequency criterion is better to use for the development of core lexicon measures for core nouns, verbs, adjectives, and adverbs, but not for function words. However, our findings are limited to core lexicon measures based on language samples elicited by wordless picture books. This may not be easily applied to other core lexicon measures that use different discourse elicitation tasks due to the difference in quality and quantity of language samples. Ideally, the same approach should be replicated to evaluate the appropriateness of respective criteria in the development of core lexicon measures.
SUPPLEMENTAL MATERIAL
目的
核心词汇测量在研究中受到越来越多的关注。它们旨在为临床医生提供一种临床友好的方法，根据特定话语引出任务的正常话语产生预期，对话语中的词汇检索能力进行量化。迄今为止，不同的研究小组已经使用了不同的标准来开发核心词汇测量。人们已经认识到需要在追求心理稳健测量的过程中提供统计指导。
目的
本研究旨在探讨准确测量的最佳标准。具体来说，我们专注于之前用于开发核心词汇测量的两个标准（% 和 频数）。
方法
应用两种标准（% 和 频数）开发的五个不同词类（动词、名词、形容词、副词和功能词）的核心词汇测量表，对 470 名认知健康成年人的语言样本进行了测试。使用结构方程模型，根据两种不同核心词汇测量表中核心词汇项目的生成比例，将话语层面的词汇检索能力表现建模为一个潜在变量。
结果
结果表明，两种核心词汇测量标准都能捕捉话语中的词汇检索能力。与基于频数标准的核心词汇测量相比，基于百分比标准的核心词汇测量的剩余方差更大。这表明基于百分比标准的测量受测量误差的影响更大。
结论
研究结果提供了证据，表明频数标准更适合开发基于词无图册引出的语言样本的核心名词、动词、形容词和副词的核心词汇测量，但不适合开发功能词的核心词汇测量。然而，我们的发现仅限于基于词无图册引出的语言样本的核心词汇测量。由于语言样本的质量和数量不同，这可能不容易应用于使用不同话语引出任务的其他核心词汇测量。理想情况下，应该复制相同的方法，以评估各自标准在开发核心词汇测量中的适当性。
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