Differentiating between spatial and object-based working memory using complex stimuli: an erp study.
Event-related potential studies using simple low-level stimuli have associated early visual-spatial processing with P1 amplitude, and early visual object-based processing with N2 amplitude. Other studies have linked later spatial processing and spatial working memory with posterior slow wave activity. Using complex real world representations in a matched object and spatial processing task, P1 was found to reflect spatially based information, and N2 was found to reflect object-based information. Furthermore, object-based working memory was associated with larger slow wave amplitude compared with spatial working memory, raising the possibility that spatial and object-based working memory utilize common processing resources.
Singhal
Anthony
A
CIHR Group on Action and Perception, Department of Psychology The University of Western Ontario, London, Ontario, Canada. asingha@uwo.ca
D000328:Adult; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000502:physiology*