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J Consult Clin Psychol. 1991 Feb;59(1):12-9.

Clinical significance: a statistical approach to defining meaningful change in psychotherapy research.

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  • 1Department of Psychology, University of Washington, Seattle 98195.

Abstract

In 1984, Jacobson, Follette, and Revenstorf defined clinically significant change as the extent to which therapy moves someone outside the range of the dysfunctional population or within the range of the functional population. In the present article, ways of operationalizing this definition are described, and examples are used to show how clients can be categorized on the basis of this definition. A reliable change index (RC) is also proposed to determine whether the magnitude of change for a given client is statistically reliable. The inclusion of the RC leads to a twofold criterion for clinically significant change.

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PMID:
2002127
[PubMed - indexed for MEDLINE]
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