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.
D000293:Adolescent; D001076:Aptitude; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D005824:Genetics, Behavioral; D005838:Genotype; D006801:Humans; D008297:Male; D012730:Sex Chromosomes / Q000502:physiology*; D012737:Sex Factors; D013028:Space Perception / Q000502:physiology*