Kinematic specification of dynamics as an informational basis for person-and-action perception : expectation, gender recognition, and deceptive intention.

The widespread conviction that perceiving another person must rest on ambiguous and fakeable information is challenged. Arguing from biomechanical necessities inherent in maintaining balance and coping with reactive impulses, it is shown that the detailed kinematic pattern is specific to an acting person's anatomical makeup and to the working of his or her motor control system.