Chapter

Family Studies of Intellectual Abilities in Adulthood

K. Warner Schaie

in Developmental Influences on Adult Intelligence

Published in print February 2005 | ISBN: 9780195156737
Published online September 2007 | e-ISBN: 9780199786817 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195156737.003.0014
 Family Studies of Intellectual Abilities in Adulthood

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This chapter gives an account of family studies of intellectual abilities in adulthood designed to consider similarities in adult parent-offspring and sibling pairs as well as similarity in married couples. Of particular interest is new material on changes in the rate of cognitive change across biologically related generations. Married couples were studied for as long as twenty-one years. They showed significant initial within-couple correlations on verbal meaning, inductive reasoning, and word fluency, and social responsibility, and on the Index of Educational Aptitude, even when age and education were controlled. Spousal similarity increased by length of marriage on verbal meaning, and attitudinal flexibility, and on the Index of Intellectual Ability.

Keywords: Seattle Longitudinal Study; family studies; intellectual abilities; adulthood; siblings; cognitive changes; married couples

Chapter.  9493 words.  Illustrated.

Subjects: Developmental Psychology

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