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| Cognitive Development | 2 |
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| Cognitive Ability | 1 |
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| Child Development | 1 |
| Intelligence | 1 |
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| Petrill, Stephen A. | 2 |
| Pike, Alison | 1 |
| Plomin, Robert | 1 |
| Price, Tom | 1 |
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| Journal Articles | 2 |
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Peer reviewedPetrill, Stephen A.; And Others – Child Development, 1998
Examined the origins of high general cognitive ability (g) in twins who were participating in the MacArthur Longitudinal Twin Study. Formed high g groups from the 19th percentile and above at each age. Results suggested increasing genetic influence and increasing genetic stability from 14 to 36 months and substantial genetic influences with…
Descriptors: Cognitive Ability, Cognitive Development, Etiology, Intellectual Development
Direct linkPetrill, Stephen A.; Pike, Alison; Price, Tom; Plomin, Robert – Intelligence, 2004
The current study examined whether socioeconomic status (SES) and chaos in the home mediate the shared environmental variance associated with cognitive functioning simultaneously estimating genetic influences in a twin design. Verbal and nonverbal cognitive development were assessed at 3 and 4 years for identical and same-sex fraternal twin pairs…
Descriptors: Socioeconomic Status, Language Acquisition, Genetics, Cognitive Development
