Article
Genes determine stability and the environment determines change in cognitive ability during 35 years of adulthood.
Psychological science - 1 Sept 2009
Lyons Michael J, York Timothy P, Franz Carol E, Grant Michael D, Eaves Lindon J, Jacobson Kristen C, Schaie K Warner, Panizzon Matthew S, Boake Corwin, Xian Hong, Toomey Rosemary, Eisen Seth A, Kremen William S
Abstract excerpt
Previous research has demonstrated stability of cognitive ability and marked heritability during adulthood, but questions remain about the extent to which genetic factors account for this stability. We conducted a 35-year longitudinal assessment of general cognitive ability using the Armed Forces Qualification Test administered to 7,232 male twins in early adulthood and readministered to a subset of 1,237 twins...
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