Measuring individual differences with an information-processing model.
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Female↗
Biomedical subjects
W M Yen
Publications and source records attributed to W M Yen.
Sex-linked major-gene influences on selected types of spatial performance.
Four paper-and-pencil spatial tests, measuring two- and three-dimesional spatial visualization and spatial orientation, were administered to 2508 Caucasian high-school students. Sibling correlations and within-sex score distributions were examined for the influence of a major sex-linked gene. Sex-linked influences were most clear on the test of two-dimensional visualization and on an average of the standard scores on all the tests. For those tests best fitting the genetic model, estimates of the frequency of the recessive gene (contributing to good performance) we-re near 0.45. There was evidence of incomplete dominance in females. Environmental or non-sex-linked genetic factors influenced spatial performance but did not systematically improve performance with age.
Adolescent↗
Independence of hand preference and sex-linked genetic effects on spatial performance.
The paper-and-pencil spatial performance of right- and left-handed high school students was compared separately for 1236 males and 1241 females. Handedness differences in favor of right-handed subjects were found among males only. Analysis of data for a subgroup of 555 subjects indicated that handedness and sex-linked genetic effects acted independently and additively on spatial performance.
Adolescent↗