Abstract
This study examined the effects of schedules of practice on human performance tests. Grammatical Reasoning, Code Substitution, Pattern Comparison, Aiming, and Spoke Tests were administered to 20 young U.S. Navy enlisted men under conditions of massed or distributed practice during acquisition, and under a common intermediate condition in retention. In general the effect of distribution of practice was not very strong. The easier tests were unaffected by deviations in practice schedules, but the more complex Grammatical Reasoning and fatiguing Spoke test were disrupted by massing.
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