Abstract
As part of a follow-up study of now-adult offspring who originally participated in the Hawaii Family Study of Cognition (HFSC) from 1972 to 1976, 49 females and 46 males from 73 families of Caucasian ancestry and 63 females and 55 males from 92 families of Japanese ancestry were retested (average test-retest interval, 13 years) on the battery of cognitive abilities tests they took as adolescents. Age-corrected scale scores for verbal ability, spatial ability, perceptual speed, visual memory, and unrotated first principal component were calculated for the offspring's fathers and mothers, for their original HFSC testing, and for the retesting. Model-fitting procedures for a univariate model of familial transmission indicated significant differences in the parameters between the two racial/ethnic groups for all five cognitive abilities scales. These procedures also demonstrated no significant differences in familialities for offspring abilities in adolescence vs. mature adulthood across all five abilities scales and both racial/ethnic groups.
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