Physiologic correlates of direct and averted gaze

Area of Science:

• Psychophysiology
• Social Neuroscience
• Human Behavior

Background:

• Gaze perception is crucial for social interaction.
• Previous research explored maternal responses to infant gaze.
• Understanding gaze effects requires considering viewer and stimulus characteristics.

Purpose of the Study:

• To investigate the psychophysiological impact of reciprocated vs. unreciprocated gaze.
• To analyze sex differences in response to direct and averted gaze.
• To examine habituation rates to gaze stimuli.

Main Methods:

• 24 males and 24 females viewed silent, 10-second images of adult faces.
• Stimuli included conditions with and without direct eye contact (en face).
• Skin conductance and heart rate were measured, with counterbalanced condition order.

Main Results:

• Male stimulus faces evoked significantly greater skin conductance responses.
• Heart rate responses differed based on both stimulus and viewer sex.
• Males viewing males showed unique sustained responses to unreciprocated gaze and habituation to reciprocated gaze.

Conclusions:

• Gaze direction and sex of both viewer and stimulus significantly modulate physiological responses.
• Specific patterns emerge in male-male interactions, suggesting unique social processing.
• Findings contribute to understanding the complex interplay of gaze, sex, and autonomic nervous system activity.