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Catecholamines reduce choice history biases in perceptual decision making
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Catecholamines reduce choice history biases in perceptual decision making
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Journal Article
Catecholamines reduce choice history biases in perceptual decision making
2025
Overview
Theoretical accounts postulate that the catecholaminergic neuromodulator noradrenaline shapes cognition and behavior by reducing the impact of prior expectations on learning, inference, and decision-making. A ubiquitous effect of dynamic priors on perceptual decisions under uncertainty is choice history bias: the tendency to systematically repeat, or alternate, previous choices, even when stimulus categories are presented in a random sequence. Here, we directly test for a causal impact of catecholamines on these priors. We pharmacologically elevated catecholamine levels in human participants through the application of the noradrenaline reuptake inhibitor atomoxetine. We quantified the resulting changes in observers’ history biases in a visual perceptual decision task. Choice history biases in this task were highly idiosyncratic, tending toward choice repetition or alternation in different individuals. Atomoxetine decreased these biases (toward either repetition or alternation) compared to placebo. Behavioral modeling indicates that this bias reduction was due to a reduced bias in the accumulation of sensory evidence, rather than of the starting point of the accumulation process. Atomoxetine had no significant effect on other behavioral measures tested, including response time and choice accuracy. Atomoxetine and variations of pupil-linked arousal at slower and faster timescales had analogous effects on choice history bias. We conclude that catecholamines reduce the impact of a specific form of prior on perceptual decisions.
Publisher
Public Library of Science,PLOS,Public Library of Science (PLoS)
Subject
/ Accuracy
/ Adrenergic Uptake Inhibitors - pharmacology
/ Adult
/ Arousal
/ Atomoxetine Hydrochloride - pharmacology
/ Behavior
/ Bias
/ Choice Behavior - drug effects
/ Choice Behavior - physiology
/ Decision Making - drug effects
/ Decision Making - physiology
/ Female
/ Humans
/ Male
/ Medicine and Health Sciences
/ Reaction Time - drug effects
/ Visual Perception - drug effects
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