PSY-33 Lecture Notes - Lecture 13: Somatization Disorder, Discriminant Validity, Psychopathology
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Internal consistency: the degree to which a set of items measures a single construct. Studies showing internal consistency of the mmpi-2 (cronbach"s alpha): Clinical scales: 0. 34 for pa to 0. 88 for sc. Content scales: 0. 68 for type a to 0. 86 cynicism. Supplementary: 0. 24 over-controlled hostility to 0. 91 ptsd-k. Studies showing temporal stability of the mmpi-2 (1-week interval): Clinical scales: 0. 58 for pa to 0. 92 for si. Content scales: 0. 78 for bizarre mentation to 0. 91 anxiety. Hunsley, et al. (1988) did a meta-analytic study on research conducted between 1970 and. All mmpi scales are quite reliable, with values that range from 0. 71 (scale ma) to a. 1981, and concluded, high of 0. 84 (scale pt) . Their study included reports from a wide range of populations with intervals that ranged from 1 day to 2 years and combined a sample exceeding 5,000. An important issue to consider is the expected test-retest reliability for psychiatric patients vs. normal controls.
