In general the groups who took only Achievement Tests in April 1946 received higher scores than those who took the Scholastic Aptitude Test and then the Achievement Test; however, the June 1945 Scholastic Aptitude Test scores show this same difference and the adjustment for differences in ability almost completely accounts for these higher scores. All of the mean discrepancies are vanishingly small with no consistency in signs. Consequently it is doubtful that fatigue has any large effect.
