Longitudinal invariance and information of the Depression, Anxiety, and Stress Scales

Ella Anghel

doi:10.1002/jclp.22968

Longitudinal invariance and information of the Depression, Anxiety, and Stress Scales

Ella Anghel

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Objectives: The study investigates the psychometric properties of the Depression, Anxiety, and Stress Scales (DASS-21). Method: The DASS-21 was administered to a community sample twice over the course of 7 months ((Formula presented.) = 235 and (Formula presented.) = 171; 51% female, M_age = 22 years). A partial credit Rasch model was used to determine the scales' longitudinal invariance and reliability. Results: The DASS-21 mostly demonstrated longitudinal invariance across administrations. The Depression and Anxiety subscales were sufficiently reliable to distinguish among the suggested severity categories, but the Stress scale was not. Conclusion: Several revisions of the DASS are recommended. It is also suggested that the Stress scale should be used with caution, given its low reliability.

Original language	English
Pages (from-to)	1923-1937
Number of pages	15
Journal	Journal of Clinical Psychology
Volume	76
Issue number	10
DOIs	https://doi.org/10.1002/jclp.22968
State	Published - 1 Oct 2020
Externally published	Yes

Keywords

DASS-21
Rasch model
anxiety
depression
measurement invariance
stress

ASJC Scopus subject areas

Clinical Psychology
Arts and Humanities (miscellaneous)

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10.1002/jclp.22968

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AB - Objectives: The study investigates the psychometric properties of the Depression, Anxiety, and Stress Scales (DASS-21). Method: The DASS-21 was administered to a community sample twice over the course of 7 months ((Formula presented.) = 235 and (Formula presented.) = 171; 51% female, Mage = 22 years). A partial credit Rasch model was used to determine the scales' longitudinal invariance and reliability. Results: The DASS-21 mostly demonstrated longitudinal invariance across administrations. The Depression and Anxiety subscales were sufficiently reliable to distinguish among the suggested severity categories, but the Stress scale was not. Conclusion: Several revisions of the DASS are recommended. It is also suggested that the Stress scale should be used with caution, given its low reliability.

KW - DASS-21

KW - Rasch model

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KW - measurement invariance

KW - stress

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ER -

Longitudinal invariance and information of the Depression, Anxiety, and Stress Scales

Abstract

Keywords

ASJC Scopus subject areas

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