A Meta-Analysis of Estimated Effect Sizes for Group versus Individual versus Control Treatments

作者: Christopher J. Tillitski

DOI: 10.1080/00207284.1990.11490601

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摘要: ABSTRACTA meta-analysis was conducted combining results from nine studies, using seventy-five outcome measures of 349 subjects. Only studies that contrasted group, individual, and control treatments with a pretest-posttest design were selected. Estimates effect sizes calculated for across all according to treatment modality (psychotherapy, counseling, or psychoeducation), type (no some treatment), date the study (1955–1969 1977–1982), subjects' age (adult, adolescent, child). Results indicated both group individual had measurable consistently greater than controls. Further, (1) counseling produced much more an either therapy psychoeducation; (2) recent larger effects older studies; (3) effective methods in adolescents, but less i...

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