Abstract
This study investigated the psychometric properties of the Depression Anxiety Stress Scale-21 (DASS-21) in a non-clinical sample of working people. Working South African persons (N = 269; females = 62%; mean age = 33, SD = 11.5) completed the DASS-21, as well as the Center for Epidemiologic Studies Depression Scale-Revised (CESD-R) and the Generalized Anxiety Disorder Scale-7 (GAD-7). Results following Confirmatory Factor Analysis and correlational analysis yielded a three-factor structure (depression, anxiety, and stress) for the DASS-21. The evidence for discriminant and convergent validity was strong. Additionally, we found good reliabilities for the overall scale as well as the subscales. The DASS-21 appears a valid and reliable instrument for measuring depression, anxiety, and stress in the workplace. Future studies should investigate differential item functioning and equivalence of items among South African working populations.
ORCID
Zonica Dreyer http://orcid.org/0000-0002-6386-1903
Carolina Henn http://orcid.org/0000-0001-5577-4757
Carin Hill http://orcid.org/0000-0002-0297-9115