Construct Validity of Raven’s Advanced Progressive Matrices for African and Non-African Engineering Students in South Africa

We test the hypothesis that the Raven’s Advanced Progressive Matrices has the same construct validity in African university students as it does in non-African students by examining data from 306 highly select 17to 23-year olds in the Faculties of Engineering and the Built Environment at the University of the Witwatersrand (177 Africans, 57 East Indians, 72 Whites; 54 women, 252 men). Analyses were made of the Matrices scores, an English Comprehension test, the Similarities subscale from the South African Wechsler Adult Intelligence Scale, end-of-year university grades, and high-school grade point average. Out of the 36 Matrices problems, the African students solved an average of 23; East Indian students, 26; andWhite students, 29 (po.001), placing them at the 60th, 71st, and 86th percentiles, respectively, and yielding IQ equivalents of 103, 108, and 118 on the 1993 US norms. The same pattern of group differences was found on the Comprehension Test, the Similarities subscale, university course grades, and high-school grade-point average. The items on the Matrices ‘behaved’ in the same way for the African students as they did for the non-African students, thereby indicating the test’s internal validity. Item analyses, including a confirmatory factor analysis, showed that the African/non-African difference was most pronounced on the general factor of intelligence. Concurrent validity was demonstrated by correlating the Matrices with the other measures, both individually and in composite. For the African group, the mean r5.28, po.05, and for the nonAfrican group, themean r5.27, po.05. Although the intercepts of the regression lines for the two groups were significantly different, their slopes were not. The results imply that scores on the Raven’s Matrices are as valid for Africans as they are for non-Africans.