Heritability is defined as the proportion of a manifested trait's varience that is due to genetic variation. Sixty-five pairs of twins were employed to investigate the heritability of: (1) short term memory (Jensen's Level 1), operationalized using of modified "digit span" test; (2) the general intellective factor (Jensen's Level II),…

Arthur R. Jensen's article presented no new data: it only reorganized a biased sample of already existent data. Nevertheless, it has been taken by opponents of school integration as definitive scientific evidence of the innate inequality of black and white students. Jensen and Van Den Haag advocate additional studies on individual learning ability…

Psychologists and a few sociologists have provided the academic respectability for the political rationale that the American body politic's civil rights indigestion needs a resurrected, separate but equal diet. Today, it is intellectually respectable to question the genetic equality of whites and blacks, to assert the cognitive incapacities of…