An Apparatus for the Study of Motor Learning Under Threat of Electric Shock

The utility of Raven's Standard Progressive Matrices (RPM) as a measure of intelligence (IQ) was studied. RPM was administered to 380 Vocational Rehabilitation applicants and correlated with selected variables and IQ measures. The results indicate that use of RPM 1948 British norms on U. S. Vocational Rehabilitation and general populations is a viable procedure where there is no need for IQ accuracy over 120. RPM did show a ceiling of about IQ 120. Construct validity was reinforced by correlations of RPM with other standard IQ measures. RPM shows the same race effect as is found regularly—the white mean is higher than the black mean—and is related to number of years education.