Psychometric aspects of the Beck Depression Inventory-II and the Beck Depression Inventory for Primary Care in Facebook users

ABSTRACT Objective The evaluation of depression with valid, reliable, and brief psychometric instruments is a common need for clinicians and other mental health professionals. The present study presents the psychometric evidence of the Beck Depression Inventory-II (BDI-II) and its version developed especially for primary care professionals (BDI-PC). Methods The sample was chosen non-probabilistically from Facebook users. The group consisted of 692 Brazilian participants, of whom 71.7% were women with a mean age of 27.9 years (SD = 11.6) and 28.3% were men with a mean age of 30.1 years (SD = 11.4). In general, the mean age of participants was 28.5 years (SD = 11.5). The Samejima Gradual Response model of the Item Response Theory (IRT) was modeled. Results The results present that BDI-II (CFI = 0.99, RMSEA = 0.04) and BDI-PC (CFI = 1.00, RMSEA = 0.01) are sufficiently unidimensional, and both have adequate reliability, with Cronbach’s alpha coefficient of 0.96 for BDI-II and 0.92 for BDI-PC. Conclusions This work presents an important contribution to the psychological/neuropsychological evaluation area, and offers to the community of researchers and clinicians original evidence that provides the use of BDI-PC.摘要 研究目的：采用有效、可靠且简洁的心理测量工具开展抑郁评估，是临床医师及其他精神卫生从业者的普遍需求。本研究提供了贝克抑郁自评量表第二版（Beck Depression Inventory-II, BDI-II）及其专为基层医疗从业者开发的版本（BDI-PC）的心理测量学证据。 研究方法：本研究通过非概率抽样方法，从Facebook平台用户中招募研究对象，最终纳入692名巴西籍参与者，其中71.7%为女性，平均年龄27.9岁（标准差SD=11.6）；28.3%为男性，平均年龄30.1岁（标准差SD=11.4）；全体参与者的平均年龄为28.5岁（标准差SD=11.5）。本研究采用项目反应理论（Item Response Theory, IRT）中的萨基马逐步反应模型进行建模。 研究结果：结果显示，BDI-II（比较拟合指数（Comparative Fit Index, CFI）=0.99，近似误差均方根（Root Mean Square Error of Approximation, RMSEA）=0.04）与BDI-PC（CFI=1.00，RMSEA=0.01）均具备良好的单维结构，且二者信度表现优异：BDI-II的克朗巴哈α系数为0.96，BDI-PC则为0.92。 研究结论：本研究为心理/神经心理评估领域提供了重要贡献，并为研究者与临床从业者群体提供了支持BDI-PC使用的原创性证据。