Recent results relating to the stability of scores on the Raven Progressive Matrices Test for different subgroups within and between the United Kingdom, United States, and other Western societies are summarized. Despite the continuous increase in scores over time, differences between socioeconomic and ethnic groups remain. (TJH)

The several statistical methods described for detecting test bias in terms of various internal features of a person's test performances and the test's construct validity can be applied to any groups in the population. But the evidence regarding groups other than U.S. blacks and whites is either lacking or is still too sketchy to permit any strong…