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What can 5,000,000 bubbles tell us about face recognition?| old_uid | 1247 |
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| title | What can 5,000,000 bubbles tell us about face recognition? |
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| start_date | 2006/05/18 |
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| schedule | 14h |
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| online | no |
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| summary | Over the past 5 years, my collaborators and I have studied face recognition using the Bubbles technique (Gosselin & Schyns, 2001). Here, I will take a bird-eye view of this endeavor: Accuracy and response time are correlated with the presence of relatively coarse facial information (mean = 4.5 cpf) between 20 and 110 ms and with relatively fine facial information (mean = 8 cpf) between 40 and 110 ms. But there are important task differences: e.g., discriminating fearful faces from faces expressing other emotions requires information at a much finer scale (45-22.5 cpf). Accuracy is also correlated with the presence of the right eye between 47 and 94 ms; then with the presence of the both eyes. Prosopagnosics, high-level autists, and patients with damage to their amygdalas do not spontaneously show this correlation between eyes and accuracy. Finally, EEG activity at P9 and P10 is mainly correlated with the contra-lateral eyes of faces between 150 and 250 ms, irrespective of the task; accuracy, response time, and EEG activity at Pz are correlated with the same visual information (e.g., for happy/neutral face discrimination: the mouth) between 300 and 400 ms. |
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| responsibles | Chauvin, Madelain |
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