ABSTRACT
Gibson proposed that movement of an observer through a stationary environment is specified by the optical flow field. To date, numerous studies have provided experimental evidence showing adaptation of human behavior that is informationally specific. Included are functional adaptation of standing, walking, running, or braking in response to perturbations of the visual scene. It is our aim in this contribution to provide insight into the visual control of supra-postural action. Participants were comfortably seated inside a phosphorescent rotating room which could be moved forward or backward around the observer. The task of the participant, whose forefinger was equipped with the stylus of a digitizer, was to point to one of three targets fixed at eye-level, at a distance equal to 85% arm length. The rotary optical flow generated by room rotation was found to affect both the accuracy and the kinematics of the aiming movement.
