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SURPRISING THREATS ACCELERATE EVIDENCE ACCUMULATION FOR CONSCIOUS PERCEPTION

View ORCID ProfileJessica McFadyen, View ORCID ProfileCooper Smout, View ORCID ProfileNaotsugu Tsuchiya, View ORCID ProfileJason B. Mattingley, View ORCID ProfileMarta I. Garrido
doi: https://doi.org/10.1101/525519
Jessica McFadyen
1Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072 Australia
2Australian Research Council Centre of Excellence for Integrative Brain Function, Australia
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  • For correspondence: j.mcfadyen@uq.edu.au
Cooper Smout
1Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072 Australia
2Australian Research Council Centre of Excellence for Integrative Brain Function, Australia
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Naotsugu Tsuchiya
3School of Psychological Sciences, Faculty of Biomedical and Psychological Sciences, Monash University, Clayton, VIC, Australia
4Monash Institute of Cognitive and Clinical Neuroscience, Monash University, Clayton, VIC, Australia
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Jason B. Mattingley
1Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072 Australia
2Australian Research Council Centre of Excellence for Integrative Brain Function, Australia
5School of Psychology, University of Queensland, Brisbane, QLD 4072 Australia
7Canadian Institute for Advanced Research, Toronto, ON M5G 1M1, Canada
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Marta I. Garrido
1Queensland Brain Institute, University of Queensland, Brisbane, QLD 4072 Australia
2Australian Research Council Centre of Excellence for Integrative Brain Function, Australia
6School of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072 Australia
8Centre for Advanced Imaging, University of Queensland, Brisbane, QLD 4072 Australia
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ABSTRACT

Our survival depends on how well we can rapidly detect threats in our environment. To facilitate this, the brain is faster to bring threatening or rewarding visual stimuli into conscious awareness than neutral stimuli. Unexpected events may indicate a potential threat, and yet we tend to respond slower to unexpected than expected stimuli. It is unclear if or how these effects of emotion and expectation interact with one’s conscious experience. To investigate this, we presented neutral and fearful faces with different probabilities of occurance in a breaking continuous flash suppression (bCFS) paradigm. Across two experiments, we discovered that fulfilled prior expectations hastened responses to neutral faces but had either no significant effect (Experiment 1) or the opposite effect (Experiment 2) on fearful faces. Drift diffusion modelling revealed that, while prior expectations accelerated stimulus encoding time (associated with the visual cortex), evidence was accumulated at an especially rapid rate for unexpected fearful faces (associated with activity in the right inferior frontal gyrus). Hence, these findings demonstrate a novel interaction between emotion and expectation during bCFS, driven by a unique influence of surprising fearful stimuli that expedites evidence accumulation in a fronto-occipital network.

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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 January 25, 2019.
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SURPRISING THREATS ACCELERATE EVIDENCE ACCUMULATION FOR CONSCIOUS PERCEPTION
Jessica McFadyen, Cooper Smout, Naotsugu Tsuchiya, Jason B. Mattingley, Marta I. Garrido
bioRxiv 525519; doi: https://doi.org/10.1101/525519
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SURPRISING THREATS ACCELERATE EVIDENCE ACCUMULATION FOR CONSCIOUS PERCEPTION
Jessica McFadyen, Cooper Smout, Naotsugu Tsuchiya, Jason B. Mattingley, Marta I. Garrido
bioRxiv 525519; doi: https://doi.org/10.1101/525519

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