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Gaze-cueing requires intact face processing - Insights from acquired prosopagnosia
Nicolas Burra1, Dirk Kerzel1, Meike Ramon2
1Université de Genève, Faculté de Psychologie et des Sciences de I'Education, Geneva, Switzerland.
Brain and Cognition
|February 15, 2017
Summary
Gaze cueing, the automatic attention shift to gaze direction, depends on facial processing. Prosopagnosia patients show gaze cueing with eyes alone, unlike controls who need full faces for this effect.
Area of Science:
- Cognitive Neuroscience
- Visual Perception
- Social Cognition
Background:
- Gaze cueing automatically directs attention with perceived gaze.
- The gaze cueing effect (GCE) shows faster responses to congruent targets.
- Unclear if GCE needs whole-face integration or just eyes.
Purpose of the Study:
- Investigate GCE dependence on facial information processing.
- Examine GCE in a patient with pure acquired prosopagnosia (PS).
- Assess the role of stimulus duration and facial context in GCE.
Main Methods:
- Gaze-cueing paradigm with manipulated cue durations (70ms, 400ms).
- Varied facial information availability (full-face vs. eyes-only).
- Compared GCE in a prosopagnosia patient (PS) and healthy controls.
Main Results:
- At 70ms, PS showed GCE with eyes-only; controls needed full-face.
- At 400ms, PS showed GCE regardless of context; controls still needed full-face.
- Dissociation observed between PS and controls based on stimulus presentation.
Conclusions:
- Attentional deployment to gaze direction requires intact facial processing.
- Briefly presented faces need full-face processing for effective gaze cueing.
- The eye region's salience for gaze cueing is modulated by overall facial context.
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