Validation of the Core Beliefs Inventory (CBI) in Brazilian Portuguese

Abstract Introduction Experiencing trauma may entail psychopathological consequences, but also changes considered to be positive (i.e., posttraumatic growth). For positive change to occur, an impact on the beliefs of individuals is required, which may be measured through the Core Beliefs Inventory (CBI). The objective of this study was to validate the Brazilian Portuguese version of the CBI. Methods A total of 248 university students (65.7% female) answered the following assessment instruments: sociodemographic data sheet, Posttraumatic Growth Inventory (PTGI), Posttraumatic Symptoms Checklist – Clinician Version (PCL-5) and the CBI. Psychometric properties of the CBI were assessed by conducting an exploratory factor analysis through a principal component analysis with varimax rotation. Internal consistency (Cronbach’s α) and convergent validity (Pearson correlation between instruments) were also investigated. Results The total scale showed adequate internal consistency (α = 0.83). A single factor solution explained 42.63% of the variance of the CBI. Significant correlations were found between CBI and PTGI, and between CBI and PCL-5. Conclusion The psychometric properties indicated adequate internal consistency and construct validity of the Brazilian Portuguese version of the CBI.

摘要 引言 经历创伤事件不仅可能引发精神病理层面的不良后果，还可能催生被视为积极的心理变化（即创伤后成长）。若要实现此类积极转变，则需对个体的核心信念产生影响，而该影响可通过核心信念量表（Core Beliefs Inventory, CBI）进行测评。本研究旨在对CBI的巴西葡萄牙语版本进行效度验证。方法 本研究共招募248名大学生（其中女性占比65.7%），让其填写以下测评工具：社会人口学资料问卷、创伤后成长量表（Posttraumatic Growth Inventory, PTGI）、创伤后应激障碍检查表-医师版（Posttraumatic Symptoms Checklist – Clinician Version, PCL-5）以及CBI。本研究通过采用方差极大旋转的主成分分析进行探索性因素分析，以此评估CBI的心理测量学特性；同时还考察了其内部一致性（克朗巴赫α系数）与聚合效度（各测评工具间的皮尔逊相关系数）。结果 总量表的内部一致性表现良好（α=0.83）。单因素模型可解释CBI量表42.63%的变异量。研究发现CBI得分与PTGI得分、PCL-5得分均存在显著相关。结论 本研究的心理测量学分析结果表明，CBI的巴西葡萄牙语版本具备良好的内部一致性与结构效度。