| Summary: | Contemporary conditions require health professionals both to employ published evidence in their individual practices and as a profession to produce valid evidence of their outcome effectiveness. Heretofore, these two processes of evidence-based practice have often been confounded as one. This theoretical paper separates the two processes into «Evidence-Supported Practice» and «Evidence-Informed Practice.» Each requires a different approach to evidence accumulation and use. Nonetheless, the two processes can and should be interlinked. For external (research) evidence, the research pyramid model values equally the internal and external validity of studies, as both are important for the implementation of external evidence. Furthermore, external evidence must be combined with internal evidence (data generated in the course of interaction with a client) in the decision-making of practitioners. Examples from recent research on occupational therapy practice and literature from several other health professions are cited for illustration. This paper formulates a more comprehensive model for evidence-based practice. From this model follow specific recommendations for practitioners, researchers, and educators in the health professions.
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