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Multiphasic value biases in fast-paced decisions

View ORCID ProfileElaine A. Corbett, View ORCID ProfileL. Alexandra Martinez-Rodriguez, Cian Judd, View ORCID ProfileRedmond G. O’Connell, View ORCID ProfileSimon P. Kelly
doi: https://doi.org/10.1101/2021.03.08.434248
Elaine A. Corbett
1Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin 2, Ireland
2School of Psychology, Trinity College Dublin, Dublin 2, Ireland
3School of Electrical and Electronic Engineering and UCD Centre for Biomedical Engineering, University College Dublin, Belfield, Dublin 4, Ireland
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  • For correspondence: corbette@ucd.ie
L. Alexandra Martinez-Rodriguez
3School of Electrical and Electronic Engineering and UCD Centre for Biomedical Engineering, University College Dublin, Belfield, Dublin 4, Ireland
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Cian Judd
1Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin 2, Ireland
2School of Psychology, Trinity College Dublin, Dublin 2, Ireland
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Redmond G. O’Connell
1Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin 2, Ireland
2School of Psychology, Trinity College Dublin, Dublin 2, Ireland
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Simon P. Kelly
1Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin 2, Ireland
3School of Electrical and Electronic Engineering and UCD Centre for Biomedical Engineering, University College Dublin, Belfield, Dublin 4, Ireland
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Abstract

Perceptual decisions are biased toward higher-value options when overall gains can be improved. When stimuli demand immediate reactions, the neurophysiological decision process dynamically evolves through distinct phases of growing anticipation, detection and discrimination, but how value biases are exerted through these phases remains unknown. Here, by parsing motor preparation dynamics in human electrophysiology, we uncovered a multiphasic pattern of countervailing biases operating in speeded decisions. Anticipatory preparation of higher-value actions began earlier, conferring a “starting point”-advantage at stimulus onset, but the delayed preparation of lower-value actions was steeper, conferring a value-opposed buildup rate bias. This, in turn, was countered by a transient deflection toward the higher value action evoked by stimulus detection. A neurally-constrained process model featuring anticipatory urgency, biased detection, and accumulation of growing stimulus-discriminating evidence, successfully captured both behavior and motor preparation dynamics. Thus, an intricate interplay of distinct biasing mechanisms serves to prioritise time-constrained perceptual decisions.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • The motivation for the modelling approach has been enhanced. Model details are better described. The model comparison has been further developed and the DDM was added.

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 December 02, 2022.
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Multiphasic value biases in fast-paced decisions
Elaine A. Corbett, L. Alexandra Martinez-Rodriguez, Cian Judd, Redmond G. O’Connell, Simon P. Kelly
bioRxiv 2021.03.08.434248; doi: https://doi.org/10.1101/2021.03.08.434248
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Multiphasic value biases in fast-paced decisions
Elaine A. Corbett, L. Alexandra Martinez-Rodriguez, Cian Judd, Redmond G. O’Connell, Simon P. Kelly
bioRxiv 2021.03.08.434248; doi: https://doi.org/10.1101/2021.03.08.434248

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