Meta-analysis of homework effects in cognitive and behavioral therapy: a replication and extension

Nikolaos Kazantzis, Craig J Whittington, Frank M Dattilio

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Kazantzis, Deane, and Ronan (2000) estimated the effect size (ES) for homework s causal effects on outcome, but did not (a) estimate ES for control therapy conditions, (b) incorporate data from correlational studies, or (c) test for outliers. The present analysis (46 studies, N = 1,072) replicated and extended Kazantzis and colleagues review and obtained a pre-posttreatment ES of d = 0.63 for control conditions, and a larger d = 1.08 for therapy conditions with homework. A pooled ES of d = 0.48 favoring homework was obtained when the analysis was restricted to controlled studies contrasting the same therapy. No evidence was found for outlier or publication bias effects. Results supported the conclusion that homework assignments enhance therapy outcomes..
Original languageEnglish
Pages (from-to)144 - 156
Number of pages13
JournalClinical Psychology: Science and Practice
Volume17
Issue number2
DOIs
Publication statusPublished - 2010
Externally publishedYes

Cite this

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abstract = "Kazantzis, Deane, and Ronan (2000) estimated the effect size (ES) for homework s causal effects on outcome, but did not (a) estimate ES for control therapy conditions, (b) incorporate data from correlational studies, or (c) test for outliers. The present analysis (46 studies, N = 1,072) replicated and extended Kazantzis and colleagues review and obtained a pre-posttreatment ES of d = 0.63 for control conditions, and a larger d = 1.08 for therapy conditions with homework. A pooled ES of d = 0.48 favoring homework was obtained when the analysis was restricted to controlled studies contrasting the same therapy. No evidence was found for outlier or publication bias effects. Results supported the conclusion that homework assignments enhance therapy outcomes..",
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Meta-analysis of homework effects in cognitive and behavioral therapy: a replication and extension. / Kazantzis, Nikolaos; Whittington, Craig J; Dattilio, Frank M.

In: Clinical Psychology: Science and Practice, Vol. 17, No. 2, 2010, p. 144 - 156.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

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AB - Kazantzis, Deane, and Ronan (2000) estimated the effect size (ES) for homework s causal effects on outcome, but did not (a) estimate ES for control therapy conditions, (b) incorporate data from correlational studies, or (c) test for outliers. The present analysis (46 studies, N = 1,072) replicated and extended Kazantzis and colleagues review and obtained a pre-posttreatment ES of d = 0.63 for control conditions, and a larger d = 1.08 for therapy conditions with homework. A pooled ES of d = 0.48 favoring homework was obtained when the analysis was restricted to controlled studies contrasting the same therapy. No evidence was found for outlier or publication bias effects. Results supported the conclusion that homework assignments enhance therapy outcomes..

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