They must be dumber. They're black, aren't they?

In a thesis study, graduate students in clinical and counseling psychology Ph.D. programs (81.9% of them were Caucasian) with an average of 28.61 months of experience with the WISC III were given identical protocols of WISC III testing with details fabricated about the children. For each protocol, they were given exactly the same description of the child except for race.

They scored African American protocols lower than Caucasian American protocols in both high and average I.Q. conditions. African American protocols were rated lower on full scale and verbal I.Q. than Caucasian protocols whether they were in the gifted or normal range of intelligence. Information and Arithmetic showed the biggest differences.

(Fields, S. Assessor Effects on the Evaluation of the WISC-III