ERIC Number: EJ746111
Record Type: Journal
Publication Date: 2006
Reference Count: 57
The Limits of Genetic Influence: A Behavior-Genetic Analysis of Infant-Caregiver Relationship Quality and Temperament
Roisman, Glenn I.; Fraley, R. Chris
Child Development, v77 n6 p1656-1667 Nov-Dec 2006
This report presents data on 9-month-old twin pairs (n[MZ]=172; n[DZ]=333) from the Early Childhood Longitudinal Study, demonstrating that the role of genetic variation among infants is trivial and the shared and nonshared environment is substantial in accounting for the observed quality of infant-caregiver relationships. In contrast, maternal reports of temperament were best accounted for by genetic variation and nonshared environmental influences. Interestingly, however, shared environmental effects were documented for "observations" of temperament. Consistent with a growing database, the current study calls into question the ubiquity of heritability effects in all domains of psychological inquiry. It also bolsters consensus in the field of developmental psychology that shared environmental effects are not as elusive as had once been thought.
Descriptors: Genetics, Caregiver Child Relationship, Infants, Twins, Longitudinal Studies, Personality, Environmental Influences, Observation, Psychological Studies, Developmental Psychology, Nature Nurture Controversy
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Early Childhood Longitudinal Survey