Scientific background: GAD-7
About this test
The GAD-7 was developed by Spitzer, Kroenke, Williams, and Löwe (2006) and is — alongside the PHQ-9 — one of the most extensively studied and widely used screening instruments in clinical psychology. Studies show good internal consistency (Cronbach's alpha usually above .89) and good sensitivity and specificity, not only for generalized anxiety disorder but also as a general indicator for panic disorder, social phobia, and PTSD. The GAD-7 is a screening and monitoring tool, not a diagnosis by itself.
Dimensions
Anxiety symptoms (total score)
Sum across all seven symptom items (0–21 points).
Sources & license
Spitzer, R. L., Kroenke, K., Williams, J. B. W., & Löwe, B. (2006). A brief measure for assessing generalized anxiety disorder: The GAD-7. Archives of Internal Medicine, 166(10), 1092–1097.
The GAD-7 is in the public domain and may be reproduced, translated, and used without permission.
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