Dynamic representations of human body movement

Author(s): Shiffrar, M.

Journal/Book: Perception. 1999; 28: 207 Brondesbury Park, London NW2 5Jn, England. Pion Ltd. 49-62.

Abstract: Psychophysical and neurophysiological studies suggest that human body motions can be readily recognized. Human bodies are highly articulated and can move in a nonrigid manner. As a result, we perceive highly dissimilar views of the human form in motion. How does the visual system integrate multiple views of a human body in motion so that we can perceive human movement as a continuous event? The results of a set of priming experiments suggest that motion can readily facilitate the linkage of different views of a moving human. Positive priming was found for novel views of a human body that fell within the path of human movement. However, no priming was observed for novel views outside the path of motion. Furthermore, priming was restricted to those views that satisfied the biomechanical constraints of human movement. These results suggest that visual representation of human movement may be based upon the movement limitations of the human body and may reflect a dynamic interaction of motion and object-recognition processes.

Note: Article Kourtzi Z, MIT, Dept Brain & Cognit Sci, Cambridge Ctr 3, NE20-4043, 77 Massachusetts Ave, Cambridge,MA 02139 USA

Keyword(s): BIOLOGICAL MOTION; OBJECT RECOGNITION; 3-DIMENSIONAL OBJECTS; VIEWPOINT INVARIANCE; TEMPORAL CORTEX; PERCEPTION; VIEW; MONKEYS; WORLD

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