States that recall of items given spaced repetitions is generally superior to recall of items given immediate repetitions. Reports on a test of Jacobi's hypothesis that this spacing effect is explained by the distinction between problem solving and remembering. Suggests that the effect cannot be explained solely by this distinction. (Author/MES)

This article examined several possible explanations for the negative effect found by Judson, et al., in their experiments which examined the facilitation of problem solving through acquisition of relevant associations. (Author/NCR)

Reports on research showing that when an event, or a problem, is repeated, the processing of that event is not necessarily repeated. Instead, sometimes the solution is remembered, and this is shown to influence subsequent retention, as well as such tasks as word perception. (AM)