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Poster C135 in Poster Session C - Friday, August 9, 2024, 11:15 am – 1:15 pm, Johnson Ice Rink
Monetary incentives bias confidence judgements less in the absence of choice
Nahuel Salem-Garcia1,2,3 (), Sébastien Massoni4,5, Maël Lebreton3,6, Valentin Wyart1,2; 1Laboratoire de Neurosciences Cognitive et Computationnelles, Institut National de la Santé et de la Recherche Médicale, 2Département d'Etudes Cognitives, Ecole Normale Superieure - PSL University, 3Swiss Center for Affective Science, Faculty of Psychology and Educational Sciences, Univeristy of Geneva, 4University of Lorraine, 5Bureau for Economic Theory and Applications
Humans have a sense of confidence that tracks the probability of having made a correct decision based on uncertain evidence. This sense, though relatively accurate, presents numerous biases, especially being affected by the subjective value of expected outcomes, and neglecting evidence for unchosen options. Here, we ask how these affective and choice-related biases may interact, by manipulating monetary incentives and choice agency in a visual categorization task with confidence judgements. We then compare the results with predictions from computational models. We show that the incentive effect on confidence is not only present when participants judge their own choices, but also when observing choices imposed by the computer. However, in the latter case, the effect is attenuated. We conclude that the incentive effect emerges from attention, not action, exaggerating subjective evidence in favor of an option, and that choice ownership intensifies this effect.
Keywords: metacognition confidence motivated cognition computational modeling