Graded Response Model Analysis and Computer Adaptive Test Simulation of the Depression Anxiety Stress Scale 21: Evaluation and Validation Study.

ABSTRACT:

Background

The Depression Anxiety Stress Scale 21 (DASS-21) is a mental health screening tool with conflicting studies regarding its factor structure. No studies have yet attempted to develop a computer adaptive test (CAT) version of it.

Objective

This study calibrated items for, and simulated, a DASS-21 CAT using a nonclinical sample.

Methods

An evaluation sample (n=580) was used to evaluate the DASS-21 scales via confirmatory factor analysis, Mokken analysis, and graded response modeling. A CAT was simulated with a validation sample (n=248) and a simulated sample (n=10,000) to confirm the generalizability of the model developed.

Results

A bifactor model, also known as the "quadripartite" model (1 general factor with 3 specific factors) in the context of the D

SUBMITTER: Kraska J 

PROVIDER: S-EPMC10337454 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature