期刊
PSYCHOLOGICAL SCIENCE
卷 32, 期 9, 页码 1494-1509出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/09567976211004547
关键词
motivation; perceptual decision-making; arousal; pupillometry; computational modeling; open data
资金
- National Institute of Mental Health [R01 MH63901]
People's perceptual reports are biased toward percepts they are motivated to see. The arousal system coordinates the body's response to motivationally significant events and is well positioned to regulate motivational effects on perceptual judgments. Heightened arousal biases people toward what they want to see and away from an objective representation of the environment.
People's perceptual reports are biased toward percepts they are motivated to see. The arousal system coordinates the body's response to motivationally significant events and is well positioned to regulate motivational effects on perceptual judgments. However, it remains unclear whether arousal would enhance or reduce motivational biases. Here, we measured pupil dilation as a measure of arousal while participants (N = 38) performed a visual categorization task. We used monetary bonuses to motivate participants to perceive one category over another. Even though the reward-maximizing strategy was to perform the task accurately, participants were more likely to report seeing the desirable category. Furthermore, higher arousal levels were associated with making motivationally biased responses. Analyses using computational models suggested that arousal enhanced motivational effects by biasing evidence accumulation in favor of desirable percepts. These results suggest that heightened arousal biases people toward what they want to see and away from an objective representation of the environment.
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