Preliminary Reliability and Validity of the Generalized Anxiety Disorder Questionnaire - IV: A Revised Self-Report Diagnostic Measure of Generalized Anxiety Disorder

Newman, M. G., Zuellig, A. R., Kachin, K. E., Constantino, M. J., Przeworski, A., Erickson, T. M., & Cashman-McGrath, L. (2002). Preliminary reliability and validity of the Generalized Anxiety Disorder Questionnaire-IV. Behavior Therapy, 33(2), 215-233. doi:10.1016/S0005-7894(02)80026-0

19 Pages Posted: 28 Jan 2015 Last revised: 8 May 2019

See all articles by Michelle G. Newman

Michelle G. Newman

Pennsylvania State University - Department of Psychology

Andrea Zuellig

Melrose Center

Kevin Kachin

Retrofit

Micheal Constantino

University of Massachusetts, Amherst

Amy Przeworski

Case Western Reserve University - Department of Psychiatry

Thane M. Erickson

Seattle Pacific University - Department of Psychology

Laurie Cashman-McGrath

Pennsylvania State University

Date Written: 2002

Abstract

This study examined the Generalized Anxiety Disorder Questionnaire-IV (GAD-Q-IV), a revised self-report diagnostic measure of generalized anxiety disorder (GAD) based on the 4th edition of the Diagnostic and Statistical Manual. Subjects were undergraduates (aged 17-41 yrs). GAD-Q-IV diagnoses were compared to structured interview diagnoses of individuals with GAD, social phobia, panic disorder, and nonanxious controls. Using Receiver Operating Characteristics analyses, the GAD-Q-IV showed 89% specificity and 83% sensitivity. The GAD-Q-IV also demonstrated test-retest reliability, convergent and discriminant validity, and kappa agreement of .67 with a structured interview. Students diagnosed with GAD by the GAD-Q-IV were not significantly different on 2 measures than a GAD community sample, but both groups had significantly higher scores than students identified as not meeting criteria for GAD, demonstrating clinical validity of the GAD-Q-IV.

Keywords: Generalized Anxiety Disorder Questionnaire IV; reliability; validity; generalized anxiety disorder; self diagnosis; college students

Suggested Citation

Newman, Michelle G. and Zuellig, Andrea and Kachin, Kevin and Constantino, Micheal and Przeworski, Amy and Erickson, Thane M. and Cashman-McGrath, Laurie, Preliminary Reliability and Validity of the Generalized Anxiety Disorder Questionnaire - IV: A Revised Self-Report Diagnostic Measure of Generalized Anxiety Disorder (2002). Newman, M. G., Zuellig, A. R., Kachin, K. E., Constantino, M. J., Przeworski, A., Erickson, T. M., & Cashman-McGrath, L. (2002). Preliminary reliability and validity of the Generalized Anxiety Disorder Questionnaire-IV. Behavior Therapy, 33(2), 215-233. doi:10.1016/S0005-7894(02)80026-0. Available at SSRN: https://ssrn.com/abstract=2555938

Michelle G. Newman (Contact Author)

Pennsylvania State University - Department of Psychology ( email )

University Park, PA
United States

Andrea Zuellig

Melrose Center ( email )

St. Louis Park, MN
United States

Kevin Kachin

Retrofit

University Park
State College, PA 16802
United States

Micheal Constantino

University of Massachusetts, Amherst ( email )

Department of Operations and Information Managemen
Amherst, MA 01003
United States

Amy Przeworski

Case Western Reserve University - Department of Psychiatry ( email )

Cleveland, OH 44106
United States

Thane M. Erickson

Seattle Pacific University - Department of Psychology ( email )

Seattle, WA 98119
United States

Laurie Cashman-McGrath

Pennsylvania State University

University Park
State College, PA 16802
United States

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