Suchergebnisse

Data from 949 families of Caucasian and 400 families of Japanese ancestry who took part in the Hawaii Family Study of Cognition were used to ascertain the associations of parental cognitive ability, parental education and paternal occupation with offspring cognitive ability. In particular, analyses were focused on testing the possible moderating effects of parental socioeconomic status on the familial transmission of cognitive abilities. Parental cognitive ability was substantially associated and parental education and paternal occupation only trivially associated with offspring performance. In contrast to the findings of Turkheimer et al. (2003), there was no evidence in these data that familiality for cognitive abilities was lower in the lower as opposed to upper levels of socioeconomic status. These results were consistent across measures, ethnicity and sex of offspring.

The present study involved analyses of a Caucasian American sample (n=949) and a Japanese American sample (n=400) for factors supporting Genetic Similarity Theory (GST). The analyses found no evidence for the presence of genetic similarity between spouses in either sample for the blood group analyses of nine loci. All results indicated random mating for blood group genes. The results did not provide consistent substantial support to show that spousal similarity is correlated with the degree of genetic component of a trait for a set of seventeen individual differences variables, with only the Caucasian sample yielding significant correlations for this analysis. A third analysis examining the correlation between presence of spousal genetic similarity and spousal similarity on observable traits was not performed because spousal genetic similarity was not observed in either sample. The overall implication of the study is that GST is not supported as an explanation for spousal similarity in humans.

SummaryThis study reports on the relative influences of parental attainment and cognitive ability and subjects' own cognitive ability, personality, and social attitudes on the educational and occupational attainments and incomes of 183 Generation 3 subjects of Caucasian ancestry and 186 of Japanese ancestry originally tested in 1972–76 in the Hawaii Family Study of Cognition (HFSC) and re-tested in 1987–88. In contrast to earlier reports of sex differences in the influence of Generation 2 attainment and on Generation 3 attainment when these offspring were younger, family background had a trivial influence and own cognitive ability had a substantial influence on educational attainment for both racial/ethnic groups and both sexes. For income, however, own cognitive ability was only a significant predictor for male subjects. Within-family correlational analyses also supported this sex difference in influences on attainment.

SummaryAs part of an ongoing study on young adult psychological and social development, data were obtained through parental reports on the present residences and educational and occupational attainments of 718 present or former residents of Hawaii (average age 31 years). These subjects, as well as their parents, had been tested between 1972 and 1976 on measures of cognitive abilities and personality. The extent of emigration to the mainland in this middle to upper-middle class sample was over 40%. On average, former Hawaii residents now living on the US mainland were of higher intelligence and educational background than their counterparts still living in Hawaii. Differences were also found for number of children, crossethnic marriages, and occupational attainment (males only). In addition, parents of US mainland residents scored significantly higher on measures of cognitive abilities and education than parents of current Hawaii residents.