title: Multivariate path analysis of specific cognitive abilities in the Colorado Adoption Project: conditional path model of assortative mating.
abstract: A multivariate path model of genetic and environmental transmission employing a conditional path representation of assortative mating was fitted to specific cognitive abilities data from the Colorado Adoption Project and evaluated using a maximum-likelihood estimation procedure. In agreement with results obtained from a previous analysis of a smaller data set, significant genetic covariation among the cognitive variables was indicated and evidence for a general genetic factor was found. However, cultural transmission parameters are nonsignificant and environmental correlations among the measures are relatively small.
authors.forename: T
authors.initials: T
authors.lastname: Rice
authors.forename: G
authors.initials: G
authors.lastname: Carey
authors.forename: D W
authors.initials: DW
authors.lastname: Fulker
authors.forename: J C
authors.initials: JC
authors.lastname: DeFries
mesh_terms: D000300:Adoption; D001076:Aptitude; D002648:Child; D003071:Cognition; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D012931:Social Environment