The factor structure and dimensional scoring of the generalized anxiety disorder questionnaire for DSM-IV

Assessment
Thomas L RodebaughRichard G Heimberg

Abstract

Despite favorable psychometric properties, the Generalized Anxiety Disorder Questionnaire for the Diagnostic and Statistical Manual of Mental Disorders (4th ed.) (GAD-Q-IV) does not have a known factor structure, which calls into question use of its original weighted scoring system (usually referred to as the dimensional score). Analyses appropriate to categorical item responses in a large sample of undergraduates were used to establish the scale's factor structure. Analyses indicated that a one-factor structure resulted in good fit. A scoring method based on this one-factor structure was compared with a variety of alternative scoring procedures, and it was found that a method based on factor scores did relatively well but that the previously suggested dimensional score failed to perform better than a simple sum of items. Results support the general unity of the measure but raise doubts regarding its scoring and response options.

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Citations

Sep 11, 2010·Cognitive Behaviour Therapy·Christina M RobinsonPeter J Norton
Mar 1, 2012·Medical Science Monitor : International Medical Journal of Experimental and Clinical Research·Jude U Ohaeri, Abdel W Awadalla
May 21, 2011·Journal of Anxiety Disorders·Dina Gordon, Richard G Heimberg
Sep 22, 2007·Journal of Anxiety Disorders·Justin W WeeksThomas L Rodebaugh
Aug 21, 2007·Journal of Anxiety Disorders·Thomas L Rodebaugh, Richard G Heimberg
Jun 14, 2016·Journal of Affective Disorders·Renee J ThompsonIan H Gotlib
Jan 20, 2016·Clinical Psychological Science : a Journal of the Association for Psychological Science·Katharina KircanskiIan H Gotlib
Jan 21, 2017·Cognition & Emotion·Katharina KircanskiIan H Gotlib
Feb 28, 2021·The Australian and New Zealand Journal of Psychiatry·Anthony F Jorm, Roger T Mulder

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