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  • Title: Differentiating between spatial and object-based working memory using complex stimuli: an erp study.
    Author: Singhal A.
    Journal: Int J Neurosci; 2006 Dec; 116(12):1457-69. PubMed ID: 17145680.
    Abstract:
    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.
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