Jensen A R
Behav Genet. 1975 Apr;5(2):151-64. doi: 10.1007/BF01066808.
Evidence on the poorer spatial visualization ability in various Negro populations compared to the white populations and on the direction and magnitude of sex difference in spatial ability relative to other abilities suggests the genetic hypothesis that spatial ability is enhanced by a sex-linked recessive gene and that, since the 20-30 percent admixture of Caucasian genes in American Negroes came mostly from male white ancestors, relatively fewer X-linked than autosomal Caucasian genes were transmitted to the American Negro gene pool. The genetic model as explicitly formulated indicates the kinds of data which could substantiate or disporve the theory, but which do not now exist.
与白人相比，不同黑人种群的空间视觉能力较差，以及空间能力相对于其他能力的性别差异方向和程度方面的证据表明了一种遗传假说，即空间能力由一种X连锁隐性基因增强，而且，由于美国黑人中有20% - 30%的高加索基因混合主要来自白人男性祖先，相对较少的X连锁高加索基因比常染色体高加索基因被传递到美国黑人基因库中。明确阐述的遗传模型指出了哪些数据可以证实或反驳该理论，但目前这些数据并不存在。
