AbstractThis study compared the performance of three different Native American groups and a Caucasian group on the Minnesota Percepto‐Diagnostic Test‐Revised and the Comprehensive Test of Basic Skills. The tests were administered to 40 Navajo, 40 Papago, 40 Hopi, and 40 Caucasian children. All of the children were in regular classrooms and none had been referred for school psychological services. The results, using a one‐way analysis of variance, indicated significant differences among the four groups on the MPD‐R rotation scores and two of the three configuration scores. When age was controlled, these MPD‐R scores remained significant. There were no significant differences among the four groups for achievement. It was also found that the MPD‐R was correlated significantly with some of the achievemen