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What you see is what you remember: Visual chunking by temporal integration enhances working memory

Akyürek, E. G., Kappelmann, N., Volkert, M. & van Rijn, H., Dec-2017, In : Journal of Cognitive Neuroscience. 29, 12, p. 2025-2036 12 p.

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  • What you see is what you remember Visual chunking

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DOI

Human memory benefits from information clustering, which can be accomplished by chunking. Chunking typically relies on expertise and strategy and it is unknown whether perceptual clustering over time, through temporal integration, can also enhance working memory. The current study examined the attentional and working memory costs of temporal integration of successive target stimulus pairs embedded in rapid serial visual presentation. Event-related potentials were measured as a function of behavioral reports: One target, two separate targets, or two targets reported as a single integrated target. N2pc amplitude, reflecting attentional processing, depended on the actual number of successive targets. The memory-related CDA and P3 components instead depended on the perceived number of targets irrespective their actual succession. The report of two separate targets was associated with elevated amplitude, while integrated as well as actual single targets exhibited lower amplitude. Temporal integration thus provided an efficient means of processing sensory input, offloading working memory so that the features of two targets were consolidated and maintained at a cost similar to that of a single target.
Original languageEnglish
Pages (from-to)2025-2036
Number of pages12
JournalJournal of Cognitive Neuroscience
Volume29
Issue number12
Early online date30-Oct-2017
Publication statusPublished - Dec-2017

    Keywords

  • SHORT-TERM-MEMORY, CONTRALATERAL DELAY ACTIVITY, EVENT-RELATED POTENTIALS, MIXED-EFFECTS MODELS, HUMAN ELECTROPHYSIOLOGY, ATTENTIONAL BLINK, INDIVIDUAL-DIFFERENCES, VISIBLE PERSISTENCE, SPATIAL ATTENTION, STORAGE CAPACITY

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