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PSI CHI: The International Honor Society in Psychology

The International Honor Society in Psychology

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Effect of Family Configuration on Preadolescents’ Decision-Making Competence

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by Fan Yang - University of Iowa


Decision-making competence (DMC) is a construct above and beyond general intelligence which depicts people’s competency in making effective decisions (Parker & Fischhoff, 2005). The present study investigated the relationship between DMC scores and the family configuration of 10-year-old preadolescents (N = 97). The family configuration factors of interest were birth order, family size, sibling spacing, and sibling sex composition, which should relate to individual differences in general intelligence, according to previous research. The final results suggested that only family size (p = .02) and the sex of the closest sibling (p = .04) were significant predictors of preadolescents’ decision-making abilities. Although some findings contradict those in general intelligence research, the key results align with the confluence model for intellectual growth (Zajonc & Markus, 1975). Implications for the current work and directions for future research were discussed to drive further progress on this research topic.


Fall 2012 | Psi Chi Journal of Undergraduate Research (Vol. 14, No. 1, p. 35), published by Psi Chi, The International Honor Society in Psychology (Chattanooga, TN). Copyright, 2012, Psi Chi, The International Honor Society in Psychology. All rights reserved.


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