An observer model of tilt perception, sensitivity and confidence

Area of Science:

• Cognitive Neuroscience
• Visual Perception

Background:

• Human confidence in perceptual decisions typically correlates with judgment precision.
• However, instances exist where precision is constant but confidence varies, suggesting distinct information sources (perceptual vs. decisional).

Purpose of the Study:

• To investigate the relationship between visual adaptation, perceptual precision, and confidence.
• To determine if differences in confidence and precision arise from distinct information types or varying information magnitudes.

Main Methods:

• Visual adaptation paradigm using oriented stimuli.
• Measurement of tilt perception, perceptual sensitivity (e.g., accuracy), and subjective confidence levels.
• Modeling observer decision-making processes.

Main Results:

• Visual adaptation differentially impacted confidence and precision.
• Certain adaptation conditions showed a greater reduction in confidence compared to precision.
• An observer model successfully explained these results by positing reliance on different magnitudes of sensory information.

Conclusions:

• Differences in perceptual sensitivity and confidence do not necessarily stem from processing different types of information.
• These divergences can be explained by the varying magnitudes of sensory information utilized by precision and confidence mechanisms.
• This finding offers a unified account for the dissociation between precision and confidence in perceptual decision-making.