Graves Roger E, Weinstein Sara
Department of Psychology, University of Victoria, P. O. Box 3050, Victoria, British Columbia V8W 3P5, Canada.
J Appl Meas. 2004;5(2):160-71.
Rasch analyses were conducted with data from 90 university students on three of the Wisconsin Scales of Psychosis Proneness--the Magical Ideation (Eckblad & Chapman, 1983), Perceptual Aberration (Chapman, Chapman, & Raulin, 1978), and Revised Social Anhedonia Scales (Eckblad, Chapman, Chapman, & Mishlove, 1982). All of the items for each of the individual scales, plus all of the items from the combined Perceptual Aberration/Magical Ideation (Per-Mag) Scale, showed satisfactory fit to the Rasch model. These results show that personality traits including these psychosis proneness, or schizotypy, traits can be measured on a theoretically sound quantitative interval scale. Rasch scale equivalents for raw scores are provided. Possible improvements to the Magical Ideation, Perceptual Aberration, and Per-Mag scales are suggested by the item analysis. Advantages of Rasch scaling for clinical applications include detection of invalid test protocols, more meaningful interpretations of test scores, and direct comparison of scores from different tests of the same construct.
对90名大学生的数据进行了拉施分析，这些数据来自威斯康星精神病易感性量表中的三个量表——神奇观念量表（埃克布拉德和查普曼，1983年）、感知偏差量表（查普曼、查普曼和劳林，1978年）以及修订后的社交快感缺乏量表（埃克布拉德、查普曼、查普曼和米什洛夫，1982年）。每个单独量表的所有项目，加上感知偏差/神奇观念合并量表（Per-Mag量表）的所有项目，都显示出与拉施模型的良好拟合。这些结果表明，包括这些精神病易感性或分裂型特质在内的人格特质可以在理论上合理的定量区间量表上进行测量。提供了原始分数的拉施量表等效值。项目分析提出了对神奇观念量表、感知偏差量表和Per-Mag量表可能的改进。拉施量表在临床应用中的优势包括检测无效的测试方案、对测试分数进行更有意义的解释，以及直接比较同一结构不同测试的分数。
