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  The pupillary light response reflects visual working memory content.

Hustá, C., Dalmaijer, E., Belopolsky, A., & Mathôt, S. (2019). The pupillary light response reflects visual working memory content. Journal of Experimental Psychology: Human Perception and Performance, 45(11), 1522-1528. doi:10.1037/xhp0000689.

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 Creators:
Hustá, Cecília1, Author           
Dalmaijer, Edwin, Author
Belopolsky, Artem, Author
Mathôt, Sebastiaan, Author
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1University of Groningen, ou_persistent22              

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 Abstract: Recent studies have shown that the pupillary light response (PLR) is modulated by higher cognitive functions, presumably through activity in visual sensory brain areas. Here we use the PLR to test the involvement of sensory areas in visual working memory (VWM). In two experiments, participants memorized either bright or dark stimuli. We found that pupils were smaller when a prestimulus cue indicated that a bright stimulus should be memorized; this reflects a covert shift of attention during encoding of items into VWM. Crucially, we obtained the same result with a poststimulus cue, which shows that internal shifts of attention within VWM affect pupil size as well. Strikingly, the effect of VWM content on pupil size was most pronounced immediately after the poststimulus cue, and then dissipated. This suggests that a shift of attention within VWM momentarily activates an "active" memory representation, but that this representation quickly transforms into a "hidden" state that does not rely on sensory areas.

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Language(s): eng - English
 Dates: 2019-11
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1037/xhp0000689
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Title: Journal of Experimental Psychology: Human Perception and Performance
Source Genre: Journal
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Pages: - Volume / Issue: 45 (11) Sequence Number: - Start / End Page: 1522 - 1528 Identifier: ISSN: 1939-1277
ISSN: 0096-1523