Semantic similarity dissociates short- from long-term recency effects: Testing a neurocomputational model of list memory |
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Authors: | Eddy J Davelaar Eddy J Davelaar Henk J Haarmann Yonatan Goshen-Gottstein Marius Usher |
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Institution: | Department of Psychology, University of Maryland, College Park, Maryland 20742, USA. edavelaar@psyc.umd.edu |
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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 (ie., 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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