In addition to ethnic origin, the subjects were further grouped by social class, middle and lower only. Social Class was a more important factor than ethnic origin in WISC differences; and, nonverbal ability differences (Cohen factors) were found to relate only to S's membership in a particular social class." (DB)

The validity is questioned of testing the intelligence of Mexican Americans via intelligence tests constructed for Anglo Americans. An overview is included of the literature concerned with the comparability of intelligence scores. Critiques are presented of 9 current studies utilizing intelligence test scores of Mexican Americans and Anglo…