This invaluable reference provides the results of a high-level task forcecreated by the American Psychological Association -- the largest professionalsociety for psychologists in the United States--for the purpose of assessing theefficacy of therapeutic interventions for each of the major clinical disorders.The volume brings together all the outcome data and clinical trials, describingwhat works, what doesn't and what is not known. Among the disorders discussedare depression, anxiety, obsessive-compulsive disorders, substance abuse, andmany more. As a reference work which integrates information from both clinicalpsychology and psychiatry, this work will serve as an indispensable deskreference for all practitioners.