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Psychotherapy, Efficacy of

  1. Lata K. McGinn1,
  2. William C. Sanderson2,
  3. Jennifer Steinberg3

Published Online: 30 JAN 2010

DOI: 10.1002/9780470479216.corpsy1053

Corsini Encyclopedia of Psychology

Corsini Encyclopedia of Psychology

How to Cite

McGinn, L. K., Sanderson, W. C. and Steinberg, J. 2010. Psychotherapy, Efficacy of. Corsini Encyclopedia of Psychology. 1–7.

Author Information

  1. 1

    Albert Einstein College of Medicine, Yeshiva University

  2. 2

    Hofstra University

  3. 3

    Cognitive and Behavioral Consultants of Westchester, White Plains, NY

Publication History

  1. Published Online: 30 JAN 2010


Two methods have been utilized to conduct scientific evaluations of psychotherapy. Efficacy and effectiveness research are both important and provide distinct information about how psychotherapy works. Although both methods are used, to date efficacy studies have dominated the field. As a result, most of what we know about how well psychotherapy works comes from efficacy rather than effectiveness research.