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The heritability of self-control: A meta-analysis
Y E Willems1, N Boesen2, J Li3
1Department of Biological Psychology, Vrije Universiteit Amsterdam, the Netherlands; Amsterdam Public Health Research Institute, Amsterdam University Medical Centers, the Netherlands; Department of Interdisciplinary Social Science, Universiteit Utrecht, the Netherlands.
Abstract:
Self-control is the ability to control one's impulses when faced with challenges or temptations, and is robustly associated with physiological and psychological well-being. Twin studies show that self-control is heritable, but estimates range between 0% and 90%, making it difficult to draw firm conclusions. The aim of this study was to perform a meta-analysis to provide a quantitative overview of the heritability of self-control. A systematic search resulted in 31 included studies, 17 reporting on individual samples, based on a sample size of >30,000 twins, published between 1997 and 2018. Our results revealed an overall monozygotic twin correlation of 0.58, and an overall dizygotic twin correlation of 0.28, resulting in a heritability estimate of 60%. The heritability of self-control did not vary across gender or age. The heritability did differ across informants, with stronger heritability estimates based on parent report versus self-report or observations. This finding provides evidence that when aiming to understand individual differences in self-control, one should take genetic factors into account. Recommendations for future research are discussed.
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