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Differential heritability across levels of cognitive ability
S S Cherny1, L R Cardon, D W Fulker
1Institute for Behavioral Genetics, University of Colorado, Boulder 80309-0447.
Behavior Genetics
|March 1, 1992
Abstract:
Differences in heritability and shared environmentality across levels of cognitive ability were assessed in a sample of 264 twin pairs tested at 1 year of age and in subsets tested at 2 and 3 years. Using an extension of the DF multiple regression methodology for analyzing twin data, no evidence was found for a linear or quadratic effect of level of cognitive ability on estimates of heritability or shared environmentality.