Much about this third edition of A Guide to Treatments That Work remains as it was in the first and second editions. Like its predecessors, this edition offers detailed evaluative reviews of current research on empirically supported treatments, written in most instances by clinical psychologists and psychiatrists who are major contributors to that literature. Similarly, the standards by which the authors were asked to evaluate the methodological rigor of the research on treatments have also remained the same. As before, they provide information on the quality of the research on treatment efficacy and effectiveness that is reviewed.