Anxiety Disorder Diagnostic Questionnaire (ADDQ)

Author of Tool: 

Norton & Robinson

Key references: 

Norton, P. J., & Robinson, C. M. (2010). Development and evaluation of the anxiety disorder diagnostic questionnaire. Cognitive Behaviour Therapy, 39, 137-149.

Primary use / Purpose: 

The ADDQ is a 4-part self-report questionnaire assessing fearfulness and apprehension/worry, the severity, interference, and distress of the anxiety, as well as specific symptoms (i.e. shortness of breath, irritability).


The ADDQ was constructed as a screening tool for the presence of clinical fear and anxiety independent of diagnoses, in both clinical and nonclinical populations.


Support for the psychometric validity of the ADDQ is presented (Norton & Robinson, 2010).



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