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| Merrill-Palmer Quarterly | 2 |
| Child Development | 1 |
| Developmental Psychology | 1 |
| Intelligence | 1 |
| Journal of Educational… | 1 |
| Journal of Marriage and the… | 1 |
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| Plomin, Robert | 7 |
| Bishop, Dorothy | 1 |
| Boomsma, Dorret I. | 1 |
| Dale, Philip | 1 |
| DeFries, J. C. | 1 |
| Eley, Thalia C. | 1 |
| Price, Thomas S. | 1 |
| Saudino, Kimberly J. | 1 |
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| Journal Articles | 6 |
| Reports - Research | 5 |
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Peer reviewedPlomin, Robert; And Others – Developmental Psychology, 1988
Results indicated significant genetic influence on eight Family Environment Scales that had been altered to obtain retrospective perceptions of family environment in childhood. The combined twin and adoption design was used with four groups of twins whose average age was 59 years. (RH)
Descriptors: Biological Influences, Children, Family Environment, Genetics
Peer reviewedBoomsma, Dorret I.; Plomin, Robert – Merrill-Palmer Quarterly, 1986
Genetic and environmental influences on heart rate were studied in samples of twin pairs in middle childhood. Heart rate was measured in resting situation and under two task conditions. Heart rate was related to parental ratings of shyness, emotionality, and selective attention measure. Multivariate analysis suggested that covariance between heart…
Descriptors: Biological Influences, Children, Environmental Influences, Genetics
Peer reviewedPlomin, Robert; And Others – Journal of Marriage and the Family, 1989
Studied genetic and environmental origins of individual differences in adults' (N=386) ratings of their current family environment using Moos Family Environment Scales (FES). Found 25 percent of adults' FES scores due to genetic differences. Found environment in which they were reared had little effect on adults' ratings of their family…
Descriptors: Affective Measures, Biological Influences, Environmental Influences, Family Environment
Peer reviewedPlomin, Robert; DeFries, J. C. – Child Development, 1983
Provides an overview of a longitudinal, prospective, multivariate adoption study of behavioral development and discusses the results of analyses of cognitive measures and environmental assessments as examples of the types of information that can emerge from a design of this sort. (Author/RH)
Descriptors: Adoption, Behavior Development, Biological Influences, Children
Peer reviewedSaudino, Kimberly J.; Plomin, Robert – Merrill-Palmer Quarterly, 1997
Conducted a trivariate genetic analysis of the Home Observation for Measurement of the Environment (HOME), Mental Development Index (MDI), and Task Orientation (TO). Found that for 101 nonadoptive and 92 adoptive sibling pairs at 12 and 24 months of age, TO explained the remaining genetic variance on the HOME not explained by the MDI. (MDM)
Descriptors: Adopted Children, Biological Influences, Cognitive Development, Family Environment
Peer reviewedPlomin, Robert – Intelligence, 1978
Scarr and Weinberg's results (Intelligence, 1977) are compared to those of similar adoption studies and found to be quite similar, despite the transracial adoption patterns in Scarr and Weinberg's sample. The author also suggests that the major contribution of behavioral genetics to psychology may be our increased understanding of the environment.…
Descriptors: Adopted Children, Biological Influences, Environmental Influences, Genetics
Peer reviewedEley, Thalia C.; Dale, Philip; Bishop, Dorothy; Price, Thomas S.; Plomin, Robert – Journal of Educational Psychology, 2001
Etiology of verbal and performance delays were investigated in a large population sample of twins at 2 and 3 years (N=2,449 pair). Longitudinal genetic analyses indicated substantial heritability of verbal delay from 2 to 3 years, especially in combination with performance delay. Results suggest a strong genetic contribution to verbal delay…
Descriptors: Biological Influences, Cognitive Ability, Cognitive Development, Developmental Delays
