Comparison of Classical Test Theory and Item Response Theory in Individual Change Assessment
Comparison of Classical Test Theory and Item Response Theory in Individual Change Assessment
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DOI：
10.1177/0146621616664046
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发表时间：
2016-11-01
影响因子：
1.2
通讯作者：
Sijtsma, Klaas
中科院分区：
文献类型：
--
作者：
Jabrayilov, Ruslan;Emons, Wilco H. M.;Sijtsma, Klaas
临床心理学家在评估个别患者的变化时，建议评估临床和统计意义。个体变化评估可以采用经典测试理论（CTT）和项目反应理论（IRT）两种方法进行。研究人员对使用IRT而不是CTT进行变化评估的可能优势持乐观态度。然而，很少有经验证据可以支持IRT在个体变化评估中的所谓优势。在这项研究中，作者比较了CTT和IRT方法在I型错误和检出率方面的差异。初步结果显示，IRT在个体变化检测方面确实优于CTT，只要测试包含至少20个项目。然而，对于较短的测试，CTT通常更能正确地检测个体的变化。讨论了研究结果及其意义。
Clinical psychologists are advised to assess clinical and statistical significance when assessing change in individual patients. Individual change assessment can be conducted using either the methodologies of classical test theory (CTT) or item response theory (IRT). Researchers have been optimistic about the possible advantages of using IRT rather than CTT in change assessment. However, little empirical evidence is available to support the alleged superiority of IRT in the context of individual change assessment. In this study, the authors compared the CTT and IRT methods with respect to their Type I error and detection rates. Preliminary results revealed that IRT is indeed superior to CTT in individual change detection, provided that the tests consist of at least 20 items. For shorter tests, however, CTT is generally better at correctly detecting change in individuals. The results and their implications are discussed.