Paper Information

Title: 

EVALUATING TEMPORAL DYNAMICS OF DIFFERENT FACIAL INFORMATION IN FACE PERCEPTION

Type: SPEECH
Author(s): ZADBOUD A.*,BASEDA Z.,ESMAEILI B.,BORJI A.,HARIRCHIAN MOHAMMAD
 
 *IRANIAN CENTER OF NEUROLOGICAL RESEARCH, IMAM KHOMEINI HOSPITAL, MEDICAL SCIENCES/UNIVERSITY OF TEHRA
 
Name of Seminar: IRANIAN CONGRESS OF PHYSIOLOGY AND PHARMACOLOGY
Type of Seminar:  CONGRESS
Sponsor:  PHYSIOLOGY AND PHARMACOLOGY SOCIETY, MASHHAD UNIVERSITY OF MEDICAL SCIENCE
Date:  2007Volume 18
 
 
Abstract: 

objectives: human face is an important stimulus for human brain and there are special cells in the brain for face perception. Human face, as a visual stimulus for human brain, consists of different types of information such as featural and configurational information. Previous studies have shown that processing of a face takes 110-130ms. Objective of this study was to highlight temporal dynamics of different facial information in face processing and compare their importance and priority.
Method: Masking paradigm was used and the effect of 4 mask types (noise, facial features, global head shape without internal features, complete face) in 5 SOA (30, 50, 80, 110, 140ms) on face discrimination performance was evaluated. Synthetic faces were used to measure the thresholds precisely.
Results: Head shape and complete face mask effect were significantly higher than feature and noise mask at SOA=30, 50, 80. The effect of head shape mask was significantly lower than complete face. Feature mask didn't show this pattern and was not significant from noise mask except at SOA=80. It seems that process of global head shape begins sooner than features and it's an important component of a face stimulus to be recognized.

 
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