Ciccarelli: Psychology_5 (5th Edition)
Ciccarelli: Psychology_5 (5th Edition)
5th Edition
ISBN: 9780134477961
Author: Saundra K. Ciccarelli, J. Noland White
Publisher: PEARSON
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Question

In a couple of sentences, explain why the results from the below graph may be used as evidence for the genetic influence on intelligence. Be sure to refer specifically to results in the graph. GCA is a measure used to measure intelligence and stands for “General Conceptual Ability”. 

GCA correlations for genetically- related, reared-together relatives Monozygotic Twins (N=4672) 0 86 Dizygotic Twins (N=5546) 0.6 Full Siblings (N=26,473) 0.47 Parent-offspring (N=843) 0.42 Half-Siblings (N=200) 0.31 Cousins (N=1176) 0.15 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Data from: Bouchard, T.J, and McGue, M. (1981). Familial studies of intelligence: A review. Science, 212: 1055-1059.
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Transcribed Image Text:GCA correlations for genetically- related, reared-together relatives Monozygotic Twins (N=4672) 0 86 Dizygotic Twins (N=5546) 0.6 Full Siblings (N=26,473) 0.47 Parent-offspring (N=843) 0.42 Half-Siblings (N=200) 0.31 Cousins (N=1176) 0.15 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Data from: Bouchard, T.J, and McGue, M. (1981). Familial studies of intelligence: A review. Science, 212: 1055-1059.
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