摘要：The investigation of how human perceive and respond to emotional signals conveyed by the human body has been for a long time secondary compared to the investigation of facial expressions and emotional scenes recognition. The aims of this behavioural study were to assess the ability to process emotional body postures and to test whether motor response is mainly driven by the emotional content of the picture or if it is influenced by motor resonance. Emotional body postures and scenes (IAPS) divided in three clusters (Fear, Happiness and Neutral) were shown to twenty-five healthy subjects (13 males, mean age ± S.D.: 22.3 y ± 1.8) in a three-alternative forced choice task. Subjects were asked to recognize the emotional content of the pictures by pressing one of three keys as fast as possible in order to estimate response times (RTs). Rating of valence and arousal was also performed. We found shorter RTs for fearful body postures as compared to happy and neutral postures. In contrast, no differences across emotional categories were found for IAPS stimuli. Analysis on valence and arousal and subsequent item analysis showed an excellent reliability of the two sets of images used in the experiment. Our results show that fearful body postures are rapidly recognised and processed, probably thanks to automatic activation of a series of central nervous system structures orchestrating the defensive threat reactions, strengthening and supporting previous neurophysiological and behavioural findings in body language processing.
关键词：emotion; body language; Reaction Time; Posture; IAPS 2
