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Published on: June 3, 2013
Perceptual criteria in the human brain
Corey N White1, Jeanette A Mumford, Russell A Poldrack
1Department of Psychology, Imaging Research Center, University of Texas at Austin, Austin, Texas 78712, USA. white.1198@mail.utexas.edu
Summary
This study reveals how the brain adjusts decision-making criteria. Perceptual criteria are represented in stimulus space, influencing choices via specific neural systems.
Area of Science:
- Cognitive Neuroscience
- Decision Science
- Neuroimaging
Background:
- Decision making involves classifying stimuli based on adjustable criteria.
- Understanding the neural basis of criterion adjustments is crucial for decision flexibility.
Purpose of the Study:
- To investigate the neural representations of perceptual criteria in decision making.
- To examine the engagement of perceptual and decision systems during criterion adjustments.
Main Methods:
- Used functional magnetic resonance imaging (fMRI) and drift diffusion models.
- Participants classified visual stimuli with varying perceptual criteria.
- fMRI data were analyzed using drift diffusion model parameters as regressors.
Main Results:
- Perceptual criteria were associated with activity in the left inferior temporal cortex.
- Stimulus size was reflected in occipital cortex activity.
- A frontoparietal network (including dlPFC) processed stimulus-criterion comparisons.
Conclusions:
- Perceptual criteria are represented in stimulus space and act as inputs for decision making.
- A common decision network is recruited for stimulus-criterion comparison, supporting behavioral bias adjustments.
- This research advances understanding of neural correlates for decision flexibility.
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