Studies involving the inheritance of primary mental abilities in twins have generally shown that spatial ability appears to be the ability most influenced by hereditary factors (Thurstone, Thurstone, & Strandskov, 1955; Vandenberg, 1965). Stafford (1961), using the Identical Blocks Test as a measure of spatial visualization, demonstrated that a sex-linked recessive gene may be involved in the transmission of spatial abilities. The present study represented an attempt to replicate Stafford's earlier work, using a test which represented a reasonably pure measure of spatial visualization ability.
StaffordR. E.Sex differences in spatial visualization as evidence of sex-linked inheritance. Perceptual and Motor Skills, 1961, 13, 428.
3.
ThurstoneT. G.ThurstoneC. C., & StrandskovH. H.A psychological study of twins. Durham, N. C.: Psychometric Lab., Univer. of North Carolina, 1955. (Report 4)
4.
VandenbergS. G.Multivariate analysis of twin differences. In VandenbergS. G. (Ed.), Methods and goals in human behavior genetics. New York: Academic Press, 1965. Pp. 29–43.
