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The psychotherapy dose-response effect and its implications for treatment delivery services
Journal article   Peer reviewed

The psychotherapy dose-response effect and its implications for treatment delivery services

N B Hansen, M J Lambert and E M Forman
Clinical psychology (New York, N.Y.), v 9(3), pp 329-343
01 Sep 2002

Abstract

Psychology Psychology, Clinical Social Sciences
To date, few studies have been published on the dose-response relationship, but there is general consensus that between 13 and 18 sessions of therapy are required for 50% of patients to improve. Reviewing the clinical trials literature reveals that in carefully controlled and implemented treatments, between 57.6% and 67.2% of patients improve within an average of 12.7 sessions. Using naturalistic data, however, revealed that the average number of sessions received in a national database of over 6,000 patients was less than five. The rate of improvement in this sample was only about 20%. These results suggest that patients, on average, do not get adequate exposure to psychotherapy, nor do they recover from illness at rates observed in clinical trials research.

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Collaboration types
Domestic collaboration
Web of Science research areas
Psychology, Clinical
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