Semantic similarity dissociates shortfrom long-term recency effects: testing a neurocomputational model of list memory

Davelaar, Eddy J. and Haarmann, H.J. and Goshen-Gottstein, Y. and Usher, Marius (2006) Semantic similarity dissociates shortfrom long-term recency effects: testing a neurocomputational model of list memory. Memory & Cognition 34 (2), pp. 323-334. ISSN 0090-502X.

Abstract

The finding that recency effects can occur not only in immediate free recall (i.e., short-term recency) but also in the continuous-distractor task (i.e., long-term recency) has led many theorists to reject the distinction between short- and long-term memory stores. Recently, we have argued that long-term recency effects do not undermine the concept of a short-term store, and we have presented a neurocomputational model that accounts for both short- and long-term recency and for a series of dissociations between these two effects. Here, we present a new dissociation between short- and long-term recency based on semantic similarity, which is predicted by our model. This dissociation is due to the mutual support between associated items in the short-term store, which takes place in immediate free recall and delayed free recall but not in continuous-distractor free recall.

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