Contrast negation differentiates visual pathways underlying dynamic and invariant facial processing

Journal of Vision
Pamela M Pallett, Ming Meng

Abstract

Bruce and Young (1986) proposed a model for face processing that begins with structural encoding, followed by a split into two processing streams: one for the dynamic aspects of the face (e.g., facial expressions of emotion) and the other for the invariant aspects of the face (e.g., gender, identity). Yet how this is accomplished remains unclear. Here, we took a psychophysical approach using contrast negation to test the Bruce and Young model. Previous research suggests that contrast negation impairs processing of invariant features (e.g., gender) but not dynamic features (e.g., expression). In our first experiment, participants discriminated differences in gender and facial expressions of emotion in upright, inverted, and contrast-negated faces. Results revealed a profound impairment for contrast-negated gender discrimination, whereas expression discrimination remained relatively robust to contrast negation. To test whether this differential effect occurs during perceptual encoding, we conducted three additional experiments in which we measured aftereffects following upright, inverted, or contrast-negated face adaptation for the same discrimination task as in the first experiment. Results showed a mild impairment with contrast...Continue Reading

Citations

Oct 27, 2015·Frontiers in Psychology·Zhengang LuMing Meng
Jul 19, 2016·Vision Research·Mladen SormazTimothy J Andrews
Jun 13, 2020·Frontiers in Psychology·Wen-Long ZhuMei-Lin Yao

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