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.
机构:
Univ Minnesota, Minneapolis Vet Affairs Med Ctr, Minneapolis, MN USA
Univ Minnesota, Dept Psychiat, Minneapolis, MN 55455 USAUniv Minnesota, Minneapolis Vet Affairs Med Ctr, Minneapolis, MN USA
Koffel, Erin A.
Koffel, Jonathan B.
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机构:
Univ Minnesota, Biomed Lib, Minneapolis, MN USAUniv Minnesota, Minneapolis Vet Affairs Med Ctr, Minneapolis, MN USA
Koffel, Jonathan B.
Gehrman, Philip R.
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机构:
Univ Penn, Philadelphia Vet Affairs Med Ctr, Philadelphia, PA 19104 USA
Univ Penn, Dept Psychiat, Philadelphia, PA 19104 USAUniv Minnesota, Minneapolis Vet Affairs Med Ctr, Minneapolis, MN USA
机构:
Australian Catholic Univ, Sch Psychol, 115 Victoria Parade,Locked Bag 4115, Melbourne, Vic 3065, AustraliaAustralian Catholic Univ, Sch Psychol, 115 Victoria Parade,Locked Bag 4115, Melbourne, Vic 3065, Australia