The Factor Structure and Dimensional Scoring of the Generalized Anxiety Disorder Questionnaire for DSM-IV

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...

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Veröffentlicht in:Assessment (Odessa, Fla.) Fla.), 2008-09, Vol.15 (3), p.343-350
Hauptverfasser: Rodebaugh, Thomas L., Holaway, Robert M., Heimberg, Richard G.
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Heimberg, Richard G.
description 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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subjects Adult
Anxiety
Anxiety Disorders - physiopathology
Anxiety Disorders - psychology
Clinical Diagnosis
Diagnostic and Statistical Manual of Mental Disorders
Evaluation Methods
Factor Analysis
Factor Analysis, Statistical
Factor Structure
Female
Goodness of Fit
Health Status Indicators
Humans
Male
Measures (Individuals)
Mental Disorders
Mental Health
Models, Statistical
Pennsylvania
Psychological Tests
Psychometrics
Risk Factors
Scoring
Severity (of Disability)
Surveys and Questionnaires - standards
Symptoms (Individual Disorders)
Test Items
Undergraduate Students
Weighted Scores
Young Adult
title The Factor Structure and Dimensional Scoring of the Generalized Anxiety Disorder Questionnaire for DSM-IV
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