We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSubstantial genetic influence on cognitive abilities in twins 80 or more years old.AuthorsMcClearn GE; Johansson B; Berg S; Pedersen NL; Ahern F; Petrill SA; Plomin RPublicationScience (New York, N.Y.), 1997, Vol 276, Issue 5318, p1560ISSN0036-8075Publication typearticleDOI10.1126/science.276.5318.1560