Clarification and elaboration on evidence-based practice in psychology.

Responds to comments by D. C. Wendt and B. D. Slife, P. H. Hunsberger, and R. B. Stuart and S. O. Lilienfeld regarding the report by the APA Presidential Task Force on Evidence-Based Practice entitled Evidence-based practice in psychology. The goal of the task force was to create a scheme that would suggest how evidence should be used to design and offer services that will benefit patients and to assure the public and the health care system that psychologists are providing evidence-based services. There were and will continue to be many scientific and philosophical issues inherent in any such enterprise, and agreement by all psychologists with every aspect of EBPP may not be possible. Nevertheless, the APA's EBPP policy and the report that accompanied it are remarkably inclusive of various perspectives while remaining unambiguous about the need to use evidence in a way that leads to effective services. What is needed at this point are clinically relevant evidence and investigations of how such evidence can be used to best benefit those served by psychological interventions.