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Updated: Sep 8, 2025
07:08
Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
Published on: August 1, 2018
8.4K
Sensory population activity reveals downstream confidence computations in the primate visual system.
Zoe M Boundy-Singer1, Corey M Ziemba1, Robbe L T Goris1
1Center for Perceptual Systems, University of Texas at Austin, Austin, TX 78712.
Summary
Macaque monkeys
Area of Science:
- Neuroscience
- Cognitive Science
- Primate Behavior
Background:
- Perceptual decisions are fallible in humans and nonhuman primates.
- Macaque monkeys show increased accuracy with higher confidence reports.
- Neural mechanisms for assessing perceptual decision quality remain unclear.
Purpose of the Study:
- To investigate the neural basis of decision confidence in primates.
- To test if confidence relates to sensory cortex population activity structure.
- To determine if this relationship differs from decision content representation.
Main Methods:
- Trained macaques to perform orientation judgment and report confidence.
- Recorded population activity in the primary visual cortex.
- Utilized decoders to analyze neural activity-choice-confidence relationships.
Main Results:
- Decision confidence correlates with the structure of population activity in sensory cortex.
- The neural representation of confidence differs from that of decision content.
- Validated hypotheses linking neural activity to metacognitive assessment.
Conclusions:
- Perceptual decisions involve downstream computations of sensory response interpretation.
- Decision confidence reflects computations assessing the reliability of sensory responses.
- Established a direct link between sensory cortex neural activity and metacognition.
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