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Intelligence and executive functioning in adult age: Effects of sibship size and birth order.
Stockholm University, Faculty of Social Sciences, Department of Psychology.
2006 (English)In: European Journal of Cognitive Psychology, ISSN 0954-1446, Vol. 18, no 1, 138-158 p.Article in journal (Refereed) Published
Abstract [en]

A study on inttelligence (i.e., block design and word comprehension) and executive functioning (i.e., working memory and verbal fluency) as related to family size and birth order was performed in middle-aged, young-old, and old-old adults. Previous studies and theories on the structural issues of family environment and its relationship to intelligence was the point of departure of this research. Using data from healthy participants, aged 35-85 years, in the Betula project (Nilsson et al., 1997, 2004), this study revealed that effects of sibship size and birth order, previously demonstrated in children, remain in adult age. Working memory was the most sensitive of the four tests used for revealing effects of the sibship size and birth order. Implications for the relationship between executive functioning and intelligence, and implications for the confluence and resource dilution models (Blake, 1981; Downey, 2001; Zajonc, 1976) are discussed.

Place, publisher, year, edition, pages
2006. Vol. 18, no 1, 138-158 p.
Keyword [en]
sibship size, birth order, intelligence
National Category
URN: urn:nbn:se:su:diva-19414DOI: doi:10.1080/09541440500216150OAI: diva2:185938
The Betula Study is funded by the Bank of Sweden Tercentenary Foundation (1988-0082:17), Swedish Council for Planning and Coordination of Research (D1988-0092, D1989-0115, D1990- 0074, D1991-0258, D1992-0143, D1997-0756, D1997-1841, D1999-0739, B1999-474), Swedish Council for Research in the Humanities and Social Sciences (F377/1988-2000), and the Swedish Council for Social Research (1988-1990: 88-0082, and 311/1991-2000).Available from: 2007-11-09 Created: 2007-11-09 Last updated: 2011-01-11Bibliographically approved

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Nilsson, Lars-Göran
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ReferencesLink to record
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