明尼苏达多项人格测验偏见量表的简化及信效度研究

Simplified version of Prejudice Scale of Minnesota Multiphasic Personality Inventory and its reliability and validity

目的对明尼苏达多项人格测验中的偏见量表(Pr)进行项目分析并研制简式量表。方法对3 767名新兵同时进行Pr和症状自评量表(SCL-90)测试,对Pr各项目进行难度和鉴别度分析,各项目分与Pr总分的相关分析,根据分析结果筛选出部分条目组成简式量表。计算原量表及简式量表的Cronbach’sα系数,以SCL-90各因子分为效标,考察原量表及简式量表的效标效度。对于其他样本,分别用16项人格因素问卷(16PF)、艾森克人格问卷(EPQ)、焦虑自评量表(SAS)等与简式量表同时施测,以16PF、EPQ、SAS等为效标,考察简式量表的效标效度。结果原量表各项目的难度在0.04～0.69之间,小于0.2的项目有17个。鉴别度指数在0.10～0.72之间,小于0.3的项目有12个。各项目分与总分的相关系数在0.19～0.60之间,小于0.3的项目有9个。保留质量较高的20个项目组成简式量表。原量表和简式量表的Cronbach’sα系数分别为0.801和0.757。原量表总分及简式量表总分与SCL-90总分及各因子分均正相关,相关系数均在0.38以上。简式量表总分与原量表总分相关,相关系数为0.967。简式量表总分与16PF、EPQ、SAS等相关。结论简式量表具有较好的信度和效度。

Objective To conduct item analysis on MMPI Prejudice Scale（Pr） and to develop a simplified version of the scale.Methods Pr and Symptom Checklist 90（SCL-90） were used to examine 3,767 newly recruited soldiers.The difficulty degree and discrimination degree of each item of Pr were analyzed;the correlation between each item score and total score was analyzed;and a simplified version of Pr was developed based on the results of item analysis.The Cronbach＇s α coefficient values of the original scale and the simplified scale were calculated,and the criterion validity was analyzed using SCL-90 as the validity criterion.For other samples,16PF,EPQ,and SAS were tested and the simplified scale was also tested at the same time.Results The difficulty degrees of the original scale ranged 0.04-0.69,with those of 17 items being less than 0.20.The discrimination degree ranged 0.10-0.72,with those of 12 items being less than 0.30.The correlation coefficient of the item score and the total score ranged 0.19-0.60,with those of 9 items being less than 0.30.The simplified scale composed of 20 items with better quality.The Cronbach＇s α coefficient values of the original scale and the short-versioned scale were 0.801 and 0.757,respectively.The total scores of both the original scale and the short-versioned scale were significantly correlated with the scores of SCL-90,with the correlation coefficient being above 0.38.The correlation coefficient between the score of the simplified scale and that of the original scale was 0.967.The correlation coefficient between the score of the simplified scale and those of 16PF,EPQ,SAS was significant.Conclusion The simplified scale in this study has a higher reliability and validity.