Experimental Abnormal Psychology

In recent years psychology has considerably expanded and en­ riched its relations with medical practice, first and foremost with psychiatry. This orientation toward experimental abnormal psy­ chology has been closely tied to the practical tasks of psychiatry: differential diagnosis, establishment of the structure and extent of impairment, and the dynamics of mental disorders as affected by treatment, etc. Experimental abnormal psychology has been no less important for the theoretical problems of