A Rasch analysis of three of the Wisconsin Scales of Psychosis Proneness: measurement of schizotypy.

摘要: Rasch analyses were conducted with data from 90 university students on three of the Wisconsin Scales Psychosis Proneness--the Magical Ideation (Eckblad & Chapman, 1983), Perceptual Aberration (Chapman, Raulin, 1978), and Revised Social Anhedonia (Eckblad, Mishlove, 1982). All items for each individual scales, plus all combined Aberration/Magical (Per-Mag) Scale, showed satisfactory fit to model. These results show that personality traits including these psychosis proneness, or schizotypy, can be measured a theoretically sound quantitative interval scale. scale equivalents raw scores are provided. Possible improvements Ideation, Aberration, Per-Mag scales suggested by item analysis. Advantages scaling clinical applications include detection invalid test protocols, more meaningful interpretations scores, direct comparison different tests same construct.