Latent structure evidence of the Depression, Anxiety and Stress Scales - Short Form

Abstract

This study aimed to investigate the psychometric properties of the Depression, Anxiety and Stress Scales - Short Form in a Brazilian sample. The instrument was answered online by 250 university students. The following models were tested through Confirmatory Factor Analysis: one-dimensional, three oblique factors, hierarchical, and bifactor. The estimated indices showed a better adjustment for a bifactor model composed of three specific factors and one global factor. Additional statistical analysis, such as explained common variance and omega hierarchical estimates, indicated that the measure is predominantly one-dimensional. The results also indicated evidence of convergent validity (Average Extracted Variance between 0.48 and 0.60), internal consistency (Cronbach's alpha between 0.87 and 0.94) and temporal reliability of the instrument (Intraclass Correlation Coefficient between 0.64 and 0.74).

Cross-cultural adaptation of the Clinical Perfectionism Questionnaire (CPQ) for Brazilians

“…The answers are given in a Likert-type scale, from "Did not apply to me at all" (0) and "Applied to me very much, or most of the time" (3). The analyses of the psychometric properties performed by Rocha et al (2021) revealed good convergent validity, internal consistency and temporal reliability indicators for the scale in the employed sample. It is possible to identify three specific factors (i.e., depression, anxiety and stress) and a general factor (i.e., negative affectivity) for the DASS-21 latent structure, although the measure is predominantly unidimensional (Rocha et al, 2021).…”

“…After the stage of content validity, the CPQ was responded by a university sample and the scores were submitted to the statistical analysis, in order to examine the instrument's psychometric properties, such as factor structure, internal consistency and validity in relation to other variables. Once the present research is part of a larger range of studies, the same database of Rocha, Hernandez, and Falcone (2021) has been analyzed applying different research questions and different analytical approaches, as suggested by Fine and Kurdek (1994) and by Kirkman and Chen (2011).…”

Psychometric properties of the Brazilian version of Clinical Perfectionism Questionnaire after rewording negatively keyed items

“…Answers are given in Likert-type scale, from "Did not apply at all" (0) to "Applied a lot or most of the time" (3). Although the presence of specific factors (i.e., depression, anxiety, and stress), the measure is predominantly unidimensional (i.e., negative affectivity) (Rocha et al, 2021).…”