A study of twins was conducted to determine the presence of an hereditary component in short term memory and in three aspects of verbal divergent thinking--flexibility, fluency, and originality. Results showed the existence of a significant genetic component in the trait of short term memory, while none was found in verbal divergent thinking. (AG)

The absence of a meaningful conception of Negro culture has forced the interpretation of almost all psychology's data on the Negro into two seemingly dichotomous categories: either that of biological incapacity, i.e., genetic inferiority, or social deviance and pathology, i.e., environmental deprivation. The cultural difference theory asserts that…