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The Hamilton Rating Scales are clinical tools originally developed by psychiatrist Max Hamilton. The Hamilton Rating Scale for Depression, abbreviated and known as the HAM-D, and the Hamilton Anxiety Rating Scale, abbreviated and known as the HAM-A, are the most widely used clinician-administered assessments of depressive and anxiety symptoms. Both the scales are intended to rate the severity of symptoms associated with their respective measured constructs and are not to be used to diagnose a particular disorder. Consequently, the scales historically have been used to measure the severity of and change in symptoms associated with treatment, whether in clinical settings or with participants in clinical trials. The Hamilton Scales are clinician administered and include brief descriptions of the items and the criteria used for ...

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