Adoption and Cognitive Development: A Meta-Analytic Comparison of Adopted and Nonadopted Children's IQ and School Performance.

This meta-analysis of 62 studies (N = 17,767 adopted children) examined whether the cognitive development of adopted children different from that of (a) children who remained in institutional care or in the birth family and (b) their current (environmental) nonadopted siblings or peers. Adopted chil...

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Published in:Psychological Bulletin Vol. 131; no. 2; pp. 301 - 317
Main Authors: IJzendoorn, Marinus H. van, Juffer, Femmie, Poelhuis, Caroline W. Klein
Format: Article
Published: American Psychological Association March 2005
Subjects:
Online Access:View this record in EBSCOhost
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        10.1037/0033-2909.131.2.301
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        atl: Adoption and Cognitive Development: A Meta-Analytic Comparison of Adopted and Nonadopted Children's IQ and School Performance.
      aug:
        au:
          IJzendoorn, Marinus H. van
          Juffer, Femmie
          Poelhuis, Caroline W. Klein
      su:
        Academic achievement
        Psychology of adoptees
        Cognitive development
        Intelligence levels
      sug:
        subj:
          Academic achievement
          Psychology of adoptees
          Cognitive development
          Intelligence levels
      ab: This meta-analysis of 62 studies (N = 17,767 adopted children) examined whether the cognitive development of adopted children different from that of (a) children who remained in institutional care or in the birth family and (b) their current (environmental) nonadopted siblings or peers. Adopted children scored higher on IQ tests than their nonadopted siblings or peers who stayed behind, and their school performance was better. Adopted children did not differ from their nonadopted environmental peers or siblings in IQ, but their school performance and language abilities lagged behind, and more adopted children developed learning problems. Taken together, the meta-analyses document the positive impact of adoption of the children's cognitive development and their remarkably normal cognitive competence but delayed school performance. Reprinted by permission of the publisher.
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    language: English
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