Research has shown that differences among ordinary people in intelligence and personality depend equally on individual genetic variability and on differences in the environments that siblings experience within the same family, not differences in the neighborhood, school, and community environments. As of yet, there are no adequate theories to…

Chinese and Japanese immigrants to the United States and Canada have survived years of discrimination and oppression and today demonstrate academic and professional achievements that are often better than those of whites. However, the Asians continue to obtain higher scores on nonverbal/spatial tests than on verbal tests and tend to be…

The history of the study of human mental ability is an example of the dialectic in social science between those who interpret data within the framework of existing social inequities and those who look for perspectives that might eventually dissolve inequities. The dedication of Henry Herbert Goddard to a belief in the scientific proof of…

This paper, focusing on differences between Caucasians and Negroes in the United States, summarizes from a "scientific standpoint" the main facts and theoretical issues involved in the study of human racial differences and behaviors. Three principles are considered to govern the orientation of this document: (1) objective research and…

This paper deals with the issue of black-white differences in cognitive skills. Some authorities attribute these differences to differences in the environments of black and white homes. Others state that the differences are due to differences in genes, i.e., heredity. Scholars holding these two opposing views have become more or less entangled in…