A discussion of two experiments with human verbal learning, and an explanation of the interference phenomena in terms of the EPAM (Elementary Perceiver and Memorizer) model. A model of an association memory, the EPAM, is a learning system, a computer simulation of human verbal learning processes. No stored information in this memory is ever physically destroyed. Yet the behavior which is normally called "forgetting" occurs because of a loss of access (temporary or permanent) to information stored in a growing net of associations. In this system, forgetting occurs as a direct consequence of normal learning processes (i.e., forgetting is the result of the interference of items later learned with items learned earlier) without the postulation of a separate mechanism.
Feigenbaum, Edward A. and Herbert Alexander Simon, Forgetting in an Association Memory. Santa Monica, CA: RAND Corporation, 1961. https://www.rand.org/pubs/papers/P2311.html. Also available in print form.
Feigenbaum, Edward A. and Herbert Alexander Simon, Forgetting in an Association Memory, Santa Monica, Calif.: RAND Corporation, P-2311, 1961. As of October 07, 2021: https://www.rand.org/pubs/papers/P2311.html