Psychometric Properties of Internet-Administered Version of Depression, Anxiety and Stress Scales (DASS-42) in sample Indonesian Adult
The psychometric properties of the Indonesian version of the Depression, Anxiety and Stress Scales (DASS), were studied in 1451 adult. The purpose of this research was to adapt DASS-42 into Indonesian and to study the validity and reliability of the Indonesian version. Depression scale has a total rest coefficient of items that shows the item discrimination ranges from 0.497 to 0.857. Anxiety scale has a total rest coefficient item that shows the item discrimination from 0.423 to 0.716. Stress Scale has a total rest coefficient of items that shows the difference in item discrimination from 0.552 to 0.714. All subscales on the stress scale have moderate to good reliability coefficients. The analysis shows the reliability coefficient is 0.954 for the Depression Scale, 0.903 for the Anxiety Scale, and 0.917 for the stress scale. Therefore, the scale is consistent with each other and the reliability of the scale is high. These results indicate that the item has an alignment (appropriate) with the original version. In other words, the results of the study show that the Indonesian version of DASS-42 has a high level of validity. The goodness-of-fit results of the CFA scale for depression, anxiety and stress, the value of the fit confirmatory factor model analysis, shows that the third scale model has a very good accuracy with the hypothetical model.