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Socioeconomic Status and Genetic Influences on Cognitive Development. Working Paper 193
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Figlio, David N.; Freese, Jeremy; Karbownik, Krzysztof; Roth, Jeffrey – National Center for Analysis of Longitudinal Data in Education Research (CALDER), 2018
Accurate understanding of environmental moderation of genetic influences is vital to advancing the science of cognitive development as well as for designing interventions. One widely-reported idea is increasing genetic influence on cognition for children raised in higher socioeconomic status families, including recent proposals that the pattern is…
Descriptors: Genetics, Cognitive Development, Child Development, Socioeconomic Influences
Familial Resemblance in Infant Mental Development
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Nichols, Paul L.; Broman, Sarah H. – Developmental Psychology, 1974
Scores on a mental development scale were correlated for 8-month-old twins and other sibling pairs. Greater correlations were found between twins than sibling pairs. (ST)
Descriptors: Cognitive Development, Family Environment, Heredity, Infants
Theory of Mind May Be Contagious, but You Don't Catch It From Your Twin
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Cassidy, Kimberly Wright; Fineberg, Deborah Shaw; Brown, Kimberly; Perkins, Alexis – Child Development, 2005
The theory-of-mind abilities of twins, children with nontwin siblings, and only children were compared to investigate further the link between number and type of siblings and theory-of-mind abilities. Three- to 5-year-old children with nontwin siblings outperformed both only children and twins with no other siblings, twins who also had other…
Descriptors: Twins, Cognitive Development, Siblings, Comparative Analysis
The La Trobe Twin Study: A Genetic Approach to the Structure and Development of Cognition in Twin Children.
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Hay, David A.; O'Brien, Pauline J. – Child Development, 1983
Describes a mixed longitudinal analysis of 1,356 twins, (three to 15-years-old) their siblings, and cousins, who underwent a battery of physical and behavioral tests. The covariance structure analysis method in biometrical genetics was employed to specify determinants of the structure of cognitive abilities, to indicate how these change during…
Descriptors: Cognitive Development, Foreign Countries, Genetics, Longitudinal Studies
The Louisville Twin Study: Developmental Synchronies in Behavior.
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Wilson, Ronald S. – Child Development, 1983
Results show individual differences in intelligence progressively stabilizing by school age, with each child following a distinct pattern of mental development. Monozygotic twins became increasingly concordant over an Hes and were closely matched on developmental trends. (Author/RH)
Descriptors: Adolescents, Cognitive Development, Family Environment, Individual Differences
Continuity and Change in General Cognitive Ability from 1 to 7 years of Age.
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Cardon, Lon R.; And Others – Developmental Psychology, 1992
Yearly cognitive tests were administered to adoptive and nonadoptive siblings between one and seven years of age and identical and nonidentical twins between one and three years. Results indicated that genetic influences are a source of continuity and change in mental development, whereas shared and nonshared environmental effects contribute to…
Descriptors: Adopted Children, Cognitive Ability, Cognitive Development, Developmental Continuity