Lindeboom R, Schmand B, Holman R, de Haan R J, Vermeulen M
Department of Clinical Epidemiology and Biostatistics, J2-212, Academic Medical Center, PO Box 22660, 1100 DD Amsterdam, The Netherlands.
Neurology. 2004 Aug 10;63(3):543-6. doi: 10.1212/01.wnl.0000133404.21840.b9.
To enhance the score interpretation and practicality of the Cambridge Cognitive Examination (CAMCOG) neuropsychological test, the authors used item response theory (IRT) to calibrate the difficulty of the items using the scores of 797 subjects. Forty-seven items fitted the IRT model. Score agreement with equally difficult short forms was excellent. The practicality and interpretability of the CAMCOG was improved, while the diagnostic accuracy of the short forms was similar to that of the original 60-item instrument.
为提高剑桥认知检查（CAMCOG）神经心理学测试的分数解释力和实用性，作者运用项目反应理论（IRT），根据797名受试者的分数对项目难度进行校准。47个项目符合IRT模型。与难度相当的简短版本的分数一致性极佳。CAMCOG的实用性和可解释性得到了提高，而简短版本的诊断准确性与原始的60项工具相似。
