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Pupillometry signatures of sustained attention and working memory

Paul A. Keene, Megan T. deBettencourt, Edward Awh, Edward K. Vogel
doi: https://doi.org/10.1101/2021.01.18.426969
Paul A. Keene
1Institute for Mind and Biology, University of Chicago, Chicago, IL 60637
2Department of Psychology, University of Chicago, Chicago, IL 60637
3Grossman Institute for Neuroscience, Quantitative Biology and Human Behavior, University of Chicago, Chicago, IL 60637
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Megan T. deBettencourt
1Institute for Mind and Biology, University of Chicago, Chicago, IL 60637
2Department of Psychology, University of Chicago, Chicago, IL 60637
3Grossman Institute for Neuroscience, Quantitative Biology and Human Behavior, University of Chicago, Chicago, IL 60637
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  • For correspondence: debetten@uchicago.edu
Edward Awh
1Institute for Mind and Biology, University of Chicago, Chicago, IL 60637
2Department of Psychology, University of Chicago, Chicago, IL 60637
3Grossman Institute for Neuroscience, Quantitative Biology and Human Behavior, University of Chicago, Chicago, IL 60637
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Edward K. Vogel
1Institute for Mind and Biology, University of Chicago, Chicago, IL 60637
2Department of Psychology, University of Chicago, Chicago, IL 60637
3Grossman Institute for Neuroscience, Quantitative Biology and Human Behavior, University of Chicago, Chicago, IL 60637
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Abstract

There exists an intricate relationship between attention and working memory. Recent work has further established that attention and working memory fluctuate synchronously, by tightly interleaving sustained attention and working memory tasks. This work has raised many open questions about physiological signatures underlying these behavioral fluctuations. Across two experiments, we explore pupil dynamics using real-time triggering in conjunction with an interleaved sustained attention and working memory task. In Experiment 1, we use behavioral real-time triggering and replicate recent findings from our lab (deBettencourt et al., 2019) that sustained attention fluctuates concurrently with the number of items maintained in working memory. Furthermore, highly attentive moments, detected via behavior, also exhibited larger pupil sizes. In Experiment 2, we develop a novel real-time pupil triggering technique to track pupil size fluctuations in real time and trigger working memory probes. We reveal that this pupil triggering procedure elicits differences in sustained attention, as indexed by response time. These experiments reflect methodological advances in real-time triggering and further characterize an important biomarker of sustained attention.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted January 20, 2021.
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Pupillometry signatures of sustained attention and working memory
Paul A. Keene, Megan T. deBettencourt, Edward Awh, Edward K. Vogel
bioRxiv 2021.01.18.426969; doi: https://doi.org/10.1101/2021.01.18.426969
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Pupillometry signatures of sustained attention and working memory
Paul A. Keene, Megan T. deBettencourt, Edward Awh, Edward K. Vogel
bioRxiv 2021.01.18.426969; doi: https://doi.org/10.1101/2021.01.18.426969

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