The resolution of face perception varies systematically across the visual field

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Human Vision

Background:

• Visual abilities vary predictably across the visual field for low-level stimuli.
• Face perception in peripheral vision has shown inconsistent spatial variation patterns.
• A potential dissociation exists between low-level and high-level visual processing spatial properties.

Purpose of the Study:

• To investigate the spatial variations in face perception within the visual field.
• To determine if face perception abilities mirror the spatial selectivity of low-level vision.
• To develop and apply an acuity test for face perception in peripheral vision.

Main Methods:

• Developed a novel acuity test for judging facial gender in peripheral vision.
• Measured the smallest face size for reliable gender judgment across different visual field locations.
• Conducted three experiments to assess face perception acuity and its spatial variations.

Main Results:

• Demonstrated the inversion effect: upright faces were judged more accurately than inverted faces.
• Observed a significant advantage for gender acuity along the horizontal meridian compared to the vertical meridian.
• Found a consistent, albeit smaller, advantage for acuity in the lower visual field compared to the upper visual field.

Conclusions:

• High-level face-selective processes are engaged in peripheral vision, as evidenced by the inversion effect.
• Spatial variations in face perception acuity (meridian and field advantages) mirror those found in low-level vision.
• Higher-level visual processing, including face perception, appears to inherit or maintain spatial selectivity patterns from early visual processing stages.