Performance of a Simple Mental Task following Various Treatments

A group of 108 male adults was randomly subdivided into four experimental treatment groups in order to test the hypothesis that the treatments would affect their performance on a symbol substitution test (simple mental task). The treatments and the post treatment simple mental task were each administered for periods of ten minutes. An analysis of variance revealed no significant difference among the performance of the groups. However, strong trends in favor of the exercise and the rest groups over the classroom instruction and the immediate retest groups did develop.