Abstract
The Raven Progressive Matrices (RPM) were administered to 408 individuals in 100 family groups. Subjects’ ages ranged from 8 to 60. Scores on all five subtests were highest in the 18‐26 age group, decreasing with age. Males scored higher on each subtest in each age group. Performance on the RPM increased with additional years of education. Within each educational level, performance declined with age. Although decline with age appears to be invariant with education, changes in schools and educational methods may be factors operating in addition to aging.