Does education mediate the relationship between IQ and age of first birth? A behavioural genetic analysis

Journal of Biosocial Science
Michelle NeissJoseph Lee Rodgers

Abstract

This study presents a multivariate behavioural genetic analysis of the relationship between education, intelligence and age of first birth. Analyses investigated the mediational role of education in explaining the relationship between intelligence and age of first birth at both the phenotypic and behavioural genetic level. The data come from the National Longitudinal Survey of Youth (NLSY), a nationally representative survey that included genetically informative full- and half-sibling pairs (n = 1423 pairs). Respondents were aged 14 to 22 when contacted in 1979. Heritability estimates were 0.32, 0.50 and 0.06 for IQ, education and age of first birth, respectively. Shared environment estimates were 0.35, 0.23 and 0.20 respectively. Common genetic and shared environmental factors were substantial in explaining the relationship between intelligence and education, and also education and age of first birth. Education partially mediated the relationship between intelligence and age of first birth only in the phenotypic analyses. After considering the genetic and shared environmental factors that influence all three variables, evidence for mediation was less convincing. This pattern of results suggests that the apparent mediational ro...Continue Reading

Citations

Jan 6, 2007·Behavior Genetics·Joseph Lee RodgersWarren B Miller
Mar 28, 2009·Journal of Biosocial Science·Gerhard Meisenberg
Jan 24, 2008·Development and Psychopathology·Brian M D'OnofrioBenjamin B Lahey
Jan 14, 2004·Journal of Personality and Social Psychology·Linda S Gottfredson
Jun 15, 2007·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Mary WaldronNicholas G Martin
Aug 19, 2014·Social Science Research·Satoshi Kanazawa
Apr 1, 2008·Journal of Youth and Adolescence·K Paige HardenRobert E Emery
Sep 29, 2015·Kölner Zeitschrift für Soziologie und Sozialpsychologie·Melinda C Mills, Felix C Tropf
Sep 22, 2009·Child Development·Jane MendleBenjamin B Lahey
Mar 14, 2009·Journal of Child Psychology and Psychiatry, and Allied Disciplines·Brian M D'OnofrioBenjamin B Lahey
Sep 10, 2008·Alcoholism, Clinical and Experimental Research·Mary WaldronNicholas G Martin
Feb 10, 2006·International Journal of Andrology·Hans-Peter KohlerKaare Christensen
Aug 4, 2015·Population Studies·Felix C TropfJornt J Mandemakers
Aug 16, 2016·Behavior Genetics·Daniel A BrileyMelinda C Mills
Oct 21, 2016·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Michael A Woodley Of MenieKevin M Beaver
Feb 6, 2018·Population and Development Review·Karel NeelsÉva Beaujouan
Sep 12, 2017·Multivariate Behavioral Research·Patrick O'Keefe, Joseph Lee Rodgers

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