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A comparison of educational achievement in a national sample of Dutch female twins and their matched singleton controls

Cohen, Celina C.C., Van Goozen, Stephanie Helena Maria, Orlebeke, Jacob F., Buitelaar, Jan K. and Cohen-Kettenis, Peggy T. 2002. A comparison of educational achievement in a national sample of Dutch female twins and their matched singleton controls. Twin Research 5 (04) , pp. 273-276. 10.1375/twin.5.4.273

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The aim of this study was to compare the educational achievement of female twins (n = 577) and their matched singleton controls (n = 447), who were selected from participants of a national test of educational achievement in the years 1993 to 1998. To assure the representativeness of the selected groups we also compared the achievement scores of the twins and the controls to those of the total Dutch female population tested in the same period. We analyzed the results of the following educational achievement scales: Language, Mathematics and Information Processing. The results indicated that the singleton classmates performed significantly better than the twins on all three scales. However, the twins performed equally well as compared to the Dutch female population. We believe that our singleton control group was not as properly selected as we intended, a selection bias operative at the level of the schools may have confounded the comparison. We therefore conclude on the basis of a comparison with the performance of the total Dutch female population that there are no differences in educational achievement between female twins and singletons.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: B Philosophy. Psychology. Religion > BF Psychology
L Education > L Education (General)
Additional Information: Pdf uploaded in accordance with publisher's policy at (accessed 25/02/2014).
Publisher: Cambridge University Press
ISSN: 1369-0523
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 04:10

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