Abstract
In the clinical evaluation of drug treatment, medical practitioners have long appreciated the fact that the response does not merely reflect the pharmacological effect of the drug. The manner in which the treatment is presented to the patient by his therapist is important and there is ample proof in the literature of the therapeutic effects of inert substances—the so-called placebo effects (1, 2). In psychiatric practice particularly, the halo effects of such factors are of considerable importance.

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