Revision of the grandiosity dimension of the Dimensional Clinical Personality Inventory and verification of its psychometric properties

Abstract Introduction: Personality disorders are among the most common disorders seen in clinical psychology. However, in Brazil there are few instruments for assessing the pathological characteristics of personality. Objective: To revise the grandiosity dimension of the Brazilian Dimensional Clinical Personality Inventory (Inventário Dimensional Clínico da Personalidade [IDCP]) and investigate its psychometric properties. Methods: A total of 225 people participated in this study. Their ages ranged from 18 to 66 years (mean [M] = 26.2, standard deviation [SD] = 8.1) and the majority were female (n = 162, 70.1%). The IDCP and the Brazilian versions of the Revised NEO Personality Inventory (NEO PI-R) and the Personality Inventory for DSM-5 (PID-5) were administered to all participants. Results: A total of 285 new items were developed and content analysis was used to select 33 of these to comprise the final version destined for administration. The results of parallel analysis and factor analysis identified four interpretable factors. Internal consistency coefficients were deemed acceptable and varied from 0.73 to 0.84 for the factors. Additionally, the expected correlations between the IDCP Inventory and the other tests were observed. Conclusion: This study demonstrates the revised dimension's suitability for assessment of the pathological traits of narcissistic personality disorder.

摘要：人格障碍（Personality disorders）是临床心理学（clinical psychology）中最为常见的精神障碍之一。然而在巴西，用于评估人格病理特征的测评工具较为匮乏。本研究的目的为：修订巴西维度化临床人格量表（Inventário Dimensional Clínico da Personalidade，缩写IDCP）的夸大维度，并考察其心理测量学属性。方法：本研究共招募225名被试，年龄跨度为18至66岁（平均年龄M=26.2，标准差SD=8.1），其中女性占比最高（n=162，占比70.1%）。所有被试均接受了巴西维度化临床人格量表（IDCP）、修订版NEO人格量表（Revised NEO Personality Inventory，NEO PI-R）以及DSM-5人格量表（Personality Inventory for DSM-5，PID-5）的施测。结果：本研究共编制285道新题目，经内容分析筛选出33道组成最终施测版本。并行分析与因素分析结果均提取出4个可解释的因素。各因素的内部一致性系数介于0.73至0.84之间，符合心理测量学可接受标准。此外，本研究还观察到IDCP与其余测评工具间存在预期的相关关系。结论：本研究表明，修订后的夸大维度适用于自恋型人格障碍（narcissistic personality disorder）的病理特质评估。