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Paper   IPM / Cognitive Sciences / 9580
School of Cognitive Sciences
  Title:   Evaluating Temporal Dynamics of Different Facial Information in Face Perception
  Author(s): 
1. 
  Status:   In Proceedings
  Proceeding:
  Year:  2007
  Supported by:  IPM
  Abstract:
Human face, as a visual stimulus for human brain, provides different types of information such as featural and configurational. Previous studies have shown that processing of a face takes 110 - 130 ms. Our objective was to highlight temporal dynamics of different facial information in face processing and compare their importance and priority. Masking paradigm was used and the effect of four mask types (noise, facial features, global head shape without internal features, complete face) at 5 SOAs (30, 50, 80, 110, 140 ms) on face discrimination performance was evaluated. Synthetic faces were used in order to measure the thresholds precisely. Head shape and complete face mask effect were significantly higher than feature and noise mask at SOAs of 30, 50, 80 ms. The effect of head-shape mask was significantly lower than that of complete face. Feature mask did not show this pattern and was not significantly different from the noise mask except at SOA=80 ms. It seems that global head-shape process begins sooner than that of features and it is an important component of a face stimulus to be recognized.

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