University of Medicine and Pharmacy "Carol Davila" Bucharest Bucharest, Romania.
AP-HP, DHU PePSY, hôpitaux universitaires Henri-Mondor, pôle de psychiatrie et d'addictologie, Créteil, 94000, France; Inserm, U955, équipe 15, Créteil, 94000, France; Fondation FondaMental, Créteil, 94000, France.
Encephale. 2020 Feb;46(1):7-12. doi: 10.1016/j.encep.2019.06.004. Epub 2019 Sep 18.
We assessed the effect of invalid responding on factor structure and on scores of schizotypy through the factor analysis of the Schizotypal Personality Questionnaire-Brief (SPQ-B) in a sample of 580 Romanian students using 3 validity items and 5 social desirability items.
We examined the factor structure of the SPQ-B, we compared the mean SPQ-B scores between reliable and unreliable responders and between high vs. low social desirability responders, and we re-run the factor analysis restricting the sample to the reliable or low social desirability responders.
Factor analysis resulted in a 3-factor solution: Cognitive-perceptual, Interpersonal and Disorganized dimensions. Unreliable responders had lower scores of positive, negative and total schizotypy. Subjects with high social desirability scores had lower scores of disorganized schizotypy. Factor analyses in the samples of "good" responders showed minor differences in reliable responders, whereas, after taking into account the effect of social desirability, 2 items correctly loaded on expected dimensions.
Random responding and social desirability could influence scores of schizotypy and factor structure. Simple methods could be used to identify invalid responses. The effect of social desirability could be linked to the phrasing of items.
我们通过对罗马尼亚 580 名学生的 Schizotypal 人格问卷-简表（SPQ-B）使用 3 个效度量表和 5 个社会期望量表的因子分析，评估了无效回答对精神分裂症结构和精神分裂症评分的影响。
我们检验了 SPQ-B 的因子结构，比较了可靠和不可靠应答者之间以及高社会期望和低社会期望应答者之间的 SPQ-B 得分均值，并将样本限制在可靠或低社会期望应答者中重新进行因子分析。
因子分析产生了 3 个因子解：认知-知觉、人际和紊乱维度。不可靠应答者的正性、负性和总精神分裂症评分较低。高社会期望得分的受试者的紊乱精神分裂症评分较低。在“良好”应答者的样本中进行因子分析时，在可靠应答者中存在较小的差异，而在考虑到社会期望的影响后，2 个项目正确地加载到预期的维度上。
随机应答和社会期望可能会影响精神分裂症评分和因子结构。可以使用简单的方法来识别无效反应。社会期望的影响可能与项目的措辞有关。
