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A comprehensive multilevel model meta-analysis of self-concept interventions

O'Mara, AJ; Marsh, HW; Craven, RG; (2006) A comprehensive multilevel model meta-analysis of self-concept interventions. In: Proceedings of the 4th International Biennial SELF Research Conference 2006. The University of Michigan: Ann Arbor, Michigan. Green open access

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Abstract

The efficacy of self-concept interventions has previously been examined through traditional meta-analytic methods, and a host of moderators of intervention outcomes have been identified (O’Mara, Marsh, & Craven, 2004; Haney & Durlak, 1998; Hattie, 1992). However, traditional meta-analytic models have increasingly been criticized because they fail to account for the nested structure of effect sizes within studies, thereby violating statistical assumptions of independence. The multilevel model approach to meta-analysis takes into account the hierarchical structure of meta-analytic data, thus providing findings that are more statistically sound. Consequently, the present study applies the multilevel model technique to the analysis of the self-concept intervention literature. The overall mean effect size of .47 suggests a moderate impact of interventions on self-concept at post-test, and analyses show that intervention effects are maintained at follow-up. Other moderators examined include the construct validity approach to the multidimensionality of self-concept; the focus of the intervention on self-concept; the use of random assignment to treatment and control groups; the control group type; treatment type; and the treatment administrator. Intraclass correlations and the variance explained by each moderator model are presented to emphasise the importance of using a multilevel model approach to meta-analytic research. It is concluded that multilevel models provide a more accurate understanding of the self-concept intervention literature than traditional meta-analytic models. Suggestions for future self-concept intervention design and evaluation are provided.

Type: Proceedings paper
Title: A comprehensive multilevel model meta-analysis of self-concept interventions
Event: 4th International Biennial SELF Research Conference 2006
Location: University of Michigan, Ann Arbor, United States
Dates: 01 July 2006
Open access status: An open access version is available from UCL Discovery
Publisher version: http://www.rcgd.isr.umich.edu/garp/self/index.html
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Education
UCL > Provost and Vice Provost Offices > School of Education > UCL Institute of Education
UCL > Provost and Vice Provost Offices > School of Education > UCL Institute of Education > IOE - Social Research Institute
URI: https://discovery.ucl.ac.uk/id/eprint/1508112
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