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Slow and steady wins the race: k positively predicts fertilityin the USA and Sweden
Department of Psychology, Technische Universität Chemnitz, Chemnitz, Germany; Center Leo Apostel for Interdisciplinary Studies, Vrije Universiteit Brussel, Brussels, Belgium.
Department of Psychaitry, University of California San Francisco, San Francisco, CA, USA.
Department of Psychology, University of Arizona, Tucson, AZ, USA.
Umeå University, Faculty of Social Sciences, Department of Psychology.
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2016 (English)In: Evolutionary Psychological Science, E-ISSN 2198-9885Article in journal (Refereed) Epub ahead of print
Abstract [en]

Abstract Nothing is presently known about the relationshipbetween individual differences in fertility and life history (LH)speed, as measured by the K-Factor. To examine this relationship,the correlation between LH speed and the number ofchildren was examined in two, large samples (MIDUS II andthe Swedish STAGE dataset). Their association was positiveand statistically significant in both cross-national samples.The association was robust with respect to statistically controllingfor participant age. Nested model comparison of aModel looking only at linear effects with a second Modelincorporating a quadratic term did not improve model fit inany instance, suggesting directional selection for slower LH,The heritability of the indicators comprising the K-Factor positivelymoderated the strength of selection, while K-Factorloading weakly negatively moderated selection strength, suggestingthat K-Factor variance, as a multivariate latent construct,is not the primary target of selection. These results areconsistent with fertility intentions data indicating positive correlationsbetween slower LH and desired numbers of children.In modern environments, higher mating effort does not appearto result in more offspring, likely because of strategicinterference suppressing the fertility of those with fast LH,stemming from influences that may be either endogenous(i.e., contraceptive usage) or exogenous (i.e., the presence oflaws, such as alimony) to the individual.

Place, publisher, year, edition, pages
Springer, 2016.
Keyword [en]
Fertility, Life history theory, Selection, Strategic interference
National Category
Psychology
Identifiers
URN: urn:nbn:se:umu:diva-129495DOI: 10.1007/s40806-016-0077-1OAI: oai:DiVA.org:umu-129495DiVA: diva2:1061104
Available from: 2016-12-31 Created: 2016-12-31 Last updated: 2017-04-07

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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  • de-DE
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