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Auditory location as an encoding dimension.

In two experiments, subjects were given five successive short-term memory tests. In Experiment 1, recall was not significantly facilitated when memory material in the final test was delivered to the ear opposite to the one that received the memory material in the four preceding tests. In Experiment 2, events were presented from two differentially located speakers rather than through headphones. A shift across speakers on the final test did produce proactive interference release. These findings suggest spatial location as a potential encoding dimension of verbal material.