Aptitude and achievement subtest scores (Ohio Survey Test) of 181 male eighth grade students were factor analyzed. Subjects were classified into four groups on the basis of ethnicity (black and white) and socioeconomic status (SES) (low and middle). Performance on nine tests developed by Guilford, as well as students' grade point averages in language arts, mathematics, history, science, and art were included in the factor analysis. It was found that the integration of mental abilities apparently varies as a function of social class and race. "Cognitive maps" of the higher performing youngsters (middle and low SES whites) contain fewer, more inclusive, intellectual factors than those of the lower performing youngsters. (Author)