Serial dependence in the perception of faces

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Psychology

Background:

• The visual system maintains a stable perception of objects despite image fluctuations.
• Recent studies show perceptual biases toward recent stimuli for low-level features (e.g., orientation, numerosity).
• The mechanism for object identity continuity, unlike low-level features, remains unclear.

Purpose of the Study:

• To investigate if the visual system creates perceptual continuity for object identity, specifically faces.
• To determine if current face perception is biased by recently viewed faces.
• To explore the existence of an object-selective continuity field.

Main Methods:

• Participants viewed sequences of faces with varying identities and viewpoints.
• Perception of face identity was measured across trials.
• Analysis focused on systematic biases in identity perception relative to recently viewed faces.

Main Results:

• Face identity perception was systematically biased toward identities seen seconds prior.
• This bias occurred even across changes in face viewpoint.
• The effect was independent of prior responses or measurement methods.

Conclusions:

• The visual system exhibits serial dependence for face identity perception, creating an object-selective continuity field.
• This bias promotes object identity invariance over time, contributing to perceptual continuity.
• This finding provides strong evidence for continuity mechanisms operating at the object level in visual processing.