Male—female differences on the Japanese WAIS-R

This paper analyzes the standardization sample of the Japanese WAIS-R for male—female differences. It was found that males have a higher full scale IQ by 3.3 IQ points, that differences on the subtests are similar to those in the American standardization sample, and that there has been no tendency for the differences to diminish over a period of ca. 50 yr separating the youngest and oldest cohorts in the sample.