title: Twin studies, heritability, and intelligence.
authors.forename: A
authors.initials: A
authors.lastname: Falek
authors.forename: L F
authors.initials: LF
authors.lastname: Jarvik
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000235:genetics; D006801:Humans; D007360:Intelligence / Q000235:genetics*; D008875:Middle Aged; D018433:Twin Studies as Topic / Q000706:statistics & numerical data*; D014429:Twins, Dizygotic / Q000235:genetics; D014430:Twins, Monozygotic / Q000235:genetics