ABSTRACT
Experimental analyses o f the learning process have developed into two rather d ifferent approaches. One, carried out by biologically oriented scientists, seeks to establish the locus o f plasticity, and the nature o f the more or less permanent changes which allow an accumulation of experience to alter behavior. The other engages computer-oriented scientists and experimental psychologists using human subjects. It focuses on the nature o f processes o f retrieval: Questions are asked regarding the span which can handle a store, the types o f accessing which make available that which is stored, and the structures o f the accessing processes. Both o f these approaches are based on a model in which the memory store associates spatio-temporally contiguous experiences and accumulates the residues of such associations which then become accessible when some similar experience addresses the storage locus.
