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Memory for drawings in locations: Spatial source memory and event-related potentials

Published online by Cambridge University Press:  01 July 2000

CYMA VAN PETTEN
Affiliation:
Department of Psychology, University of Arizona, Tucson, USA
AVA J. SENKFOR
Affiliation:
Department of Psychology, University of Arizona, Tucson, USA
WENDY M. NEWBERG
Affiliation:
Department of Psychology, University of Arizona, Tucson, USA
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Abstract

Event-related potentials (ERPs) were recorded during recognition tasks for line drawings (items) or for both drawings and their spatial locations (sources). Recognized drawings elicited more positive ERPs than new drawings. Independent of accuracy in the spatial judgment, the old/new effect in the source recognition task was larger over the prefrontal scalp, and of longer temporal duration than in the item recognition task, suggesting that the source memory task engaged a qualitatively distinct memory process. More posterior scalp sites were sensitive to the accuracy of the source judgment, but this effect was delayed relative to the difference between studied and unstudied drawings, suggesting that source memory processes are completed after item recognition. Similarities and differences between spatial source memory and memory for conjunctions of other stimulus attributes are discussed, together with the role of prefrontal cortex in memory.

Type
Research Article
Copyright
2000 Society for Psychophysiological Research

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