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Eye movements support behavioral pattern completion

Jordana S. Wynn, Jennifer D. Ryan, Bradley R. Buchsbaum
doi: https://doi.org/10.1101/764084
Jordana S. Wynn
1Department of Psychology, University of Toronto, Toronto, ON, Canada
2Rotman Research Institute, Baycrest Hospital, Toronto, ON, Canada
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  • For correspondence: jwynn@research.baycrest.org
Jennifer D. Ryan
1Department of Psychology, University of Toronto, Toronto, ON, Canada
2Rotman Research Institute, Baycrest Hospital, Toronto, ON, Canada
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Bradley R. Buchsbaum
1Department of Psychology, University of Toronto, Toronto, ON, Canada
2Rotman Research Institute, Baycrest Hospital, Toronto, ON, Canada
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Abstract

The ability to recall a detailed event from a simple reminder is supported by pattern completion, a cognitive operation performed by the hippocampus wherein existing mnemonic representations are retrieved from incomplete input. In behavioral studies, pattern completion is often inferred through the false endorsement of lure (i.e., similar) items as old. However, evidence that such a response is due to the specific retrieval of a similar, previously encoded item is severely lacking. We used eye movement (EM) monitoring during a partial-cue recognition memory task to index reinstatement of lure images behaviorally via the recapitulation of encoding-related EMs or, gaze reinstatement. Participants reinstated encoding-related EMs following degraded retrieval cues and this reinstatement was negatively correlated with accuracy for lure images, suggesting that retrieval of existing representations (i.e., pattern completion) underlies lure false alarms. Our findings provide novel evidence linking gaze reinstatement and pattern completion and advance a functional role for EMs in memory retrieval.

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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-NC-ND 4.0 International license.
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Posted September 12, 2019.
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Eye movements support behavioral pattern completion
Jordana S. Wynn, Jennifer D. Ryan, Bradley R. Buchsbaum
bioRxiv 764084; doi: https://doi.org/10.1101/764084
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Eye movements support behavioral pattern completion
Jordana S. Wynn, Jennifer D. Ryan, Bradley R. Buchsbaum
bioRxiv 764084; doi: https://doi.org/10.1101/764084

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