The present experiment examined stereotype threat effects on the Raven Advanced Progressive Matrices (Raven) scores of African Americans. Support was found for Hypothesis 1, which stated that African Americans would experience significantly greater stereotype threat than Whites during an IQ testing situation. Hypothesis 2 proposed that a significant Race x Test Diagnosticity Condition interaction would occur in which the mean difference in intelligence test scores between African Americans and Whites (favoring the latter group) would be largest when the test was framed as a measure of intelligence, and smaller when framed as nonindicative of intelligence. Limited support for Hypothesis 2 was found in that a marginally significant Race x Test Diagnosticity Condition interaction was obtained. However, the interaction failed to reach conventional levels of statistical significance. Although preliminary, the present findings provide some support for the notion that stereotype threat compromises the intelligence test performance of African Americans.