title: Covariation between intelligence and speed of cognitive processing: genetic and environmental influences.
authors: H Z
authors: HZ
authors: Ho
authors: L A
authors: LA
authors: Baker
authors: S N
authors: SN
authors: Decker
mesh_terms: D000293:Adolescent; D002648:Child; D003071:Cognition; D004777:Environment; D005260:Female; D005824:Genetics, Behavioral; D006801:Humans; D007360:Intelligence; D008297:Male; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic