Topic: perceptual confidence

Observers are aware of the fallibility of perception. When we experience a high degree of confidence in a perceptual interpretation, that interpretation is more likely to be correct than when we feel less confident. Here we ask how neural population activity in sensory cortex informs confidence in perceptual decisions. We used multilaminar electrode arrays to record population activity in the primary visual cortex of a macaque monkey performing a perceptual confidence task. Specifically, the animal judged the orientation of ambiguous stimuli (“clockwise” vs “counter-clockwise”) and simultaneou

When we feel confident in a perceptual decision, that decision is more likely to be correct. How does the brain assess the quality of perceptual decisions? Here, we test two connected hypotheses. First, that perceptual confidence relates to the structure of population activity in the sensory cortex. And second, that this relation differs from the one between sensory activity and perceptual decisions. To this end, we studied neural population activity in the primary visual cortex of macaque monkeys performing a task that reveals the animal's subjective sense of perceptual confidence. Specifical

False percepts induced by sensory conditioning are a promising laboratory model for hallucinations and similar illusory phenomena, with links to both clinical symptoms and neurobiological features of psychosis. The aim of the present study was to investigate the relationship between extracellular dopamine levels, as quantified by the dopamine D2/3 receptor agonist ligand [11C]-(+)-PHNO, and confidence with which conditioned auditory percepts are reported.To this end, ten healthy volunteers (2m, 8f) completed a cross-modal sensory conditioning task after undergoing a bolus plus constant infusio