Spacing and repetition effects in human memory: application of the SAM model
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TL;DR
A new model for spacing based on the SAM theory of memory developed by Raaijmakers and Shiffrin is presented and it is shown that the model predicts many standard findings including the lack of a spacing effect for the recall of at least one of two items each presented once.
Abstract
Spacing between study trials of an item increases the probability that item will be recalled. This article presents a new model for spacing based on the SAM theory of memory developed by Raaijmakers and Shiffrin (1980, 1981). The model is a generalization of the SAM model as applied to interference paradigms (Mensink & Raaijmakers, 1988, 1989) and may be viewed as a mathematical version of the Component-Levels theory proposed by Glenberg (1979). It is assumed that on a second presentation of an item, information is added to an existing trace if the episodic memory image corresponding to that item is retrieved. If it is not retrieved, a new image is stored. It is shown that the model predicts many standard findings including the lack of a spacing effect for the recall of at least one of two items each presented once (Ross & Landauer, 1978).
