Individual differences in serial dependence manifest when sensory uncertainty is high

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Past perceptual experiences can alter subsequent perception, a phenomenon known as serial dependence.
• Emerging research suggests sensory uncertainty modulates this serial dependence effect.

Purpose of the Study:

• To investigate how varying levels of visual noise (sensory uncertainty) affect serial dependence in face identity perception.
• To determine if individual differences in bias tendencies interact with sensory uncertainty.

Main Methods:

• Participants viewed face stimuli with no, low, or high levels of visual noise.
• Face identity perception was assessed using morphing techniques across trials with alternating noise and noise-free presentations.
• Individual bias tendencies were measured and correlated with performance under different noise conditions.

Main Results:

• Identity perception of noise-free faces was biased by previous faces, except when the preceding face had low noise.
• High noise levels revealed significant individual differences in bias magnitude, reflecting general bias tendencies.
• Individual bias tendencies correlated significantly with performance on low-noise trials, but not no-noise trials.

Conclusions:

• Sensory uncertainty plays a significant role in modulating serial dependence during face identity perception.
• An individual's inherent bias tendency interacts with sensory uncertainty, further altering perceptual outcomes.