用认知伪装甄别测验探测模拟认知损害

目的:评价认知伪装甄别测验探测模拟认知损害的有效性。方法:模拟组40名健康成人在测验中伪装有认知损害,对照组40名健康成人要求尽最大能力完成测验。结果:模拟组的测验成绩比对照组低1-2个标准差(P<0.001)。按四种评判标准判断,对照组所有被试均被判为真诚,特异性100%,而模拟组的阳性命中率分别为82.5%(得分模式)、77.5%(最低分)、52.5%(划界分)和37.5%(概率分),加权敏感性分别为90.0%、87.5%、71.25%和50%。判别分析显示6指标组合或分测验分的归类正确率均为97.5%。结论:认知伪装甄别测验对模拟伪装具有较好甄别能力。

The Detection of Simulated Cognitive Impairment、with the CMST

Objective: To evaluate effect of Cognitive Malingering Screening Test(CMST) used to detect simulated cognitive impairment. Methods: Forty normal adults(Simulative group) completed the CMST under instructions to malinger having cognitive impairment and 40 normal subjects (Control group) completed the CMST under instructions to try their best. Results: The average performance of simulative group was 1.0-2.0 standard deviations worse than that of control group. According to four judgment standards, all subjects in the control group were classified as honest, with specificity of 100%, while positive hit rate of the simulative group was 82.5%(performance model), 77.5% (the lowest performance ), 52.5%( cut-off score), and 37.5% (chance level),with weighed sensitivity of 90.0%, 87.5%, 71.25% and 50% respectively. Discriminant function analyses using the two scores or six scores derived from the CMST as predictors of group membership both resulted in a 97.5% correct classification rate. Conclusion: The CMST continues to show promise as a measure of detecting malingering cognitive impairment.