1 Leiden University, Leiden, Netherlands.
Assessment. 2017 Oct;24(7):932-944. doi: 10.1177/1073191116632340. Epub 2016 Feb 18.
The current study examines a bifactor model for the Youth Psychopathic Traits Inventory (YPI) in a Dutch community sample of adolescents ( N = 2,874). The primary goal was to examine the latent structure of the YPI with a bifactor modeling approach. Furthermore, the study examines the dimensionality and measurement invariance of the YPI. Results show that a bifactor model at subscale level fits the YPI best. The general psychopathy factor influences the 10 subscales of the YPI strongly, indicating that the YPI seems to be rather unidimensional than multidimensional. Nevertheless, the dimensions still explain nearly one third of the variance found. Findings imply that the bifactor model of the YPI should be used when examining relations with outcome variables, with a focus on the total score of the YPI, while factor scores should be reported with caution. Furthermore, the bifactor model appears invariant for gender, age, and ethnic background.
本研究在荷兰青少年社区样本中（N=2874），对青少年心理变态特征量表（YPI）的双因素模型进行了检验。主要目的是用双因素建模方法来检验 YPI 的潜在结构。此外，本研究还检验了 YPI 的维度和测量不变性。结果表明，亚量表水平的双因素模型最适合 YPI。一般心理变态因素对 YPI 的 10 个分量表有很大的影响，这表明 YPI 似乎是单维的，而不是多维的。然而，这些维度仍然解释了所发现的近三分之一的方差。研究结果表明，当用 YPI 的总分来检验与结果变量的关系时，应该使用 YPI 的双因素模型，而因子分数的报告则应该谨慎。此外，双因素模型在性别、年龄和种族背景方面似乎是不变的。
