J Speech Lang Hear Res. 2014 Jun 1;57(3):966-78. doi: 10.1044/2014_JSLHR-L-13-0171.
This study examined the test-retest stability of select word-retrieval measures in the discourses of people with aphasia who completed a 5-stimulus discourse task.
Discourse samples across 3 sessions from 12 individuals with aphasia were analyzed for the stability of measures of informativeness, efficiency, main concepts, noun and verb retrieval, word-finding difficulty, and lexical diversity. Values for correlation coefficients and the minimal detectable change score were used to assess stability for research and clinical decision making.
Measures stable enough to use in group research studies included the number of words; the number of correct information units (CIUs); the number of accurate-complete, accurate-incomplete, and absent main concepts; the percentage of T-units that had word-finding behaviors of any kind; the percentage of T-units that contained empty words; and a lexical diversity measure. Words per minute, CIUs per minute, and the percentage of T-units that contained time fillers or delays were sufficiently stable to use when making clinical decisions about an individual.
Although several of the measures demonstrated acceptable stability for group research studies, relatively few were sufficiently stable for making clinical decisions about individuals on the basis of a single administration.
本研究考察了在完成 5 刺激语篇任务的失语症患者的语篇中，特定词汇提取测量的重测稳定性。
对 12 名失语症患者的 3 个会话的语篇样本进行了分析，以评估信息性、效率、主要概念、名词和动词提取、找词困难以及词汇多样性等测量指标的稳定性。使用相关系数和最小可检测变化分数值来评估用于研究和临床决策的稳定性。
足够稳定可用于组研究的测量指标包括：词数、正确信息单位（CIU）数、准确完整、准确不完整和缺失的主要概念数、出现任何找词行为的 T 单位百分比、包含空词的 T 单位百分比以及词汇多样性测量指标。每分钟单词数、每分钟 CIU 数以及包含时间填充词或延迟的 T 单位百分比，在对个体进行临床决策时，具有足够的稳定性。
尽管有几个测量指标显示出适合组研究的可接受稳定性，但相对较少的测量指标具有足够的稳定性，可以根据单次测试结果对个体做出临床决策。
