Shows that subjects who receive the impression that psychology experiments are worthless exert less time and effort in task performance than subjects who believe in favorable comments, although both groups indicate similar amounts of effort on self-rating scales. Bibliography and table. (RW)

Presents the procedures, results, and conclusions of a study to investigate the effects of (1) sex, (2) intelligence, and (3) prior experience in puzzle solving on the categorization skills of youth. A two-dimensional type puzzle involving 4 sorting variables was given to 110 ninth graders. 22 subjects, age from 7 to 18 were given a 3-dimensional…

Reports a study of 140 first-grade children which, contrary to Osgood's findings, revealed an increase of word perception errors when input information was reduced by increasing presentation speed. The inability of tachistoscopic drills to provide valid learning reinforcement for sight vocabulary study was implied. Bibliography. (MD)