"Object-discrimination learning-set functions were obtained from two groups of rhesus monkeys, one group receiving 3 trials per problem, the other receiving 12 trials per problem throughout. No differences were found between the two groups when Trial 2 performance was measured over successive blocks of trials. Learning-set functions from several similar experiments were then compared with the functions obtained in the present study. The results of this survey suggest that from 3 trials per problem to 12 trials per problem, an equivalent number of trials yields equivalent learning-set development, and that at some point beyond 12 tr/p the effect of an equivalent number of trials gradually declines." From Psyc Abstracts 36:02:2EJ96L. (PsycINFO Database Record (c) 2006 APA, all rights reserved)