IQ Similarity in Twins, Siblings, Half-Siblings, Cousins, and Random Pairs.

Rodgers, Joseph Lee; Rowe, David C.

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Peer reviewed

ERIC Number: EJ365462

Record Type: Journal

Publication Date: 1987

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IQ Similarity in Twins, Siblings, Half-Siblings, Cousins, and Random Pairs.

Rodgers, Joseph Lee; Rowe, David C.

Intelligence, v11 n3 p199-206 Jul-Sep 1987

IQ scores from five kinship categories of 7- to 12-year-olds were analyzed into genetic and environmental components. The common environmental effects were larger for older children than younger children. Overall, the Genetic and Common Environment Sources each accounted for approximately 40% of the IQ variability in the data. (Author/LMO)

Descriptors: Age Differences, Elementary Education, Family Environment, Genetics, Intelligence Quotient, Kinship, Longitudinal Studies, Mathematical Models, Nature Nurture Controversy, Siblings, Twins

Publication Type: Journal Articles; Reports - Research

Education Level: N/A

Audience: N/A

Language: English

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