Pupil-linked arousal is driven by decision uncertainty and alters serial choice bias
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Pupil-linked arousal is driven by decision uncertainty and alters serial choice bias. / Urai, Anne E; Braun, Anke; Donner, Tobias H.
In: NAT COMMUN, Vol. 8, No. 14637, 03.03.2017, p. 1-11.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Pupil-linked arousal is driven by decision uncertainty and alters serial choice bias
AU - Urai, Anne E
AU - Braun, Anke
AU - Donner, Tobias H
PY - 2017/3/3
Y1 - 2017/3/3
N2 - While judging their sensory environments, decision-makers seem to use the uncertainty about their choices to guide adjustments of their subsequent behaviour. One possible source of these behavioural adjustments is arousal: decision uncertainty might drive the brain's arousal systems, which control global brain state and might thereby shape subsequent decision-making. Here, we measure pupil diameter, a proxy for central arousal state, in human observers performing a perceptual choice task of varying difficulty. Pupil dilation, after choice but before external feedback, reflects three hallmark signatures of decision uncertainty derived from a computational model. This increase in pupil-linked arousal boosts observers' tendency to alternate their choice on the subsequent trial. We conclude that decision uncertainty drives rapid changes in pupil-linked arousal state, which shape the serial correlation structure of ongoing choice behaviour.
AB - While judging their sensory environments, decision-makers seem to use the uncertainty about their choices to guide adjustments of their subsequent behaviour. One possible source of these behavioural adjustments is arousal: decision uncertainty might drive the brain's arousal systems, which control global brain state and might thereby shape subsequent decision-making. Here, we measure pupil diameter, a proxy for central arousal state, in human observers performing a perceptual choice task of varying difficulty. Pupil dilation, after choice but before external feedback, reflects three hallmark signatures of decision uncertainty derived from a computational model. This increase in pupil-linked arousal boosts observers' tendency to alternate their choice on the subsequent trial. We conclude that decision uncertainty drives rapid changes in pupil-linked arousal state, which shape the serial correlation structure of ongoing choice behaviour.
KW - Journal Article
U2 - 10.1038/ncomms14637
DO - 10.1038/ncomms14637
M3 - SCORING: Journal article
C2 - 28256514
VL - 8
SP - 1
EP - 11
JO - NAT COMMUN
JF - NAT COMMUN
SN - 2041-1723
IS - 14637
ER -