Empirical Evaluation of Computer-Adaptive Alternate Short Forms for the Assessment of Anomia Severity.
Empirical Evaluation of Computer-Adaptive Alternate Short Forms for the Assessment of Anomia Severity.
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DOI：
10.1044/2019_jslhr-l-19-0213
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发表时间：
2019-12
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影响因子：
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通讯作者：
William D. Hula;G. Fergadiotis;Alexander M Swiderski;J. Silkes;Stacey Kellough
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作者：
William D. Hula;G. Fergadiotis;Alexander M Swiderski;J. Silkes;Stacey Kellough
目的本研究旨在验证基于项目反应理论（IRT）的计算机自适应测验（CAT）生成的两种内容不重叠的替代测验形式的等效性。费城失语症测验（PNT; Roach，Schwartz，Martin，Grewal，& Brecher，1996）被用作失语症患者前瞻性独立样本的项目库。方法对25例发病6个月以上的失语症患者进行两种交替的CAT短形式的PNT测试，这些患者在研究前或研究期间2周内没有接受任何治疗。第一阶段包括30项PNT-CAT的管理，大约2周后进行的第二阶段包括可变长度的PNT-CAT，该PNT-CAT排除了第一阶段中管理的项目，并在能力估计的建模精度等于或大于第一阶段中获得的值时终止。在贝叶斯框架中分析能力估计。结果两个测试版本高度相关（r = 0.89），获得的平均值和标准差彼此之间没有明显差异。IRT测量模型能很好地预测两个测验版本之间的相关和误差方差。讨论-结果表明，IRT为基础的CAT替代形式可能是富有成效的用于评估失名症。IRT方法提供了优势，有效和灵敏的测量随时间的变化。未来的工作应考虑由于个人因素和干预特异性效应导致的差异项目功能的潜在影响，以及扩大项目库以最大限度地发挥测试的临床效用。补充材料https://doi.org/10.23641/asha.11368040。
Purpose The purpose of this study was to verify the equivalence of 2 alternate test forms with nonoverlapping content generated by an item response theory (IRT)-based computer-adaptive test (CAT). The Philadelphia Naming Test (PNT; Roach, Schwartz, Martin, Grewal, & Brecher, 1996)was utilized as an item bank in a prospective, independent sample of persons with aphasia. Method Two alternate CAT short forms of the PNT were administered to a sample of 25 persons with aphasia who were at least 6 months postonset and received no treatment for 2 weeks before or during the study. The 1st session included administration of a 30-item PNT-CAT, and the 2nd session, conducted approximately 2 weeks later, included a variable-length PNT-CAT that excluded items administered in the 1st session and terminated when the modeled precision of the ability estimate was equal to or greater than the value obtained in the 1st session. The ability estimates were analyzed in a Bayesian framework. Results The 2 test versions correlated highly (r = .89) and obtained means and standard deviations that were not credibly different from one another. The correlation and error variance between the 2 test versions were well predicted by the IRT measurement model. Discussion The results suggest that IRT-based CAT alternate forms may be productively used in the assessment of anomia. IRT methods offer advantages for the efficient and sensitive measurement of change over time. Future work should consider the potential impact of differential item functioning due to person factors and intervention-specific effects, as well as expanding the item bank to maximize the clinical utility of the test. Supplemental Material https://doi.org/10.23641/asha.11368040.