By David N. Lee, David S. Young (auth.), David J. Ingle, Marc Jeannerod, David N. Lee (eds.)
This quantity comprises chapters derived from a N. A. T. O. complex research Institute held in June 1983. because the director of this A. S. I. it used to be my wish that many of the e1ectrophysiologists may exhibit the possibilities in their paintings for perceptual thought, and that a few perceptionists may possibly speculate at the underlying "units" of conception in a fashion that may have interaction the mind's eye of physio logists. The reader should be the pass judgement on of no matter if this was once completed, or no matter if any such psychophysiological inter1ingua remains to be overly idealistic. it truly is transparent that when the revolution prec~pitated via Hube1 and Weisel in figuring out of visible cortical neurons we nonetheless have just a foggy suggestion of the behavioral output of any specific species of cortical detector. It was once for this reason really unlucky that people who've made nice strides in correlating attention-grabbing aspects of cat cortical physio logy with human psychophysics (Max Cynader and Martin Regan of Dalhousie collage) have been not able to wait this assembly. by no means theless, a couple of new and tough principles concerning either spatial belief and cortical mechanisms are represented during this quantity, and it really is was hoping that the reader will take into accout not just the person demonstrations however the severe questions posed by way of the apposition of the 2 various collections of experimental proof. David Ingle April 1984 VII desk OF CONTENTS PREFACE V D. N. Lee and D. S. younger visible Timing of Interceptive motion 1 J. J.
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Their projections on the plane (dotted circles) divide the optical flow into the three regions A, B, C: A unstable nodes B expanding saddles C convergent saddles. v. Space shells For the ambulant observer the ambient space does not appear isotropic. Let (J denote the angle between a visual directon and the 46 ..... p2 velocity V. Then the radial resolution is proportional to VsinO ' whereas the transverse resolution is proportional to p. This means that the visibility of relief is proportional to vsinO.
10. S catching and placins the feet t'lhen running? He propose that the tau-margin provides the necessary expropriospecific information about the organism's temporal relationship to the object or surface. 1ing constant velocity. It is a ~hysical quantity defined at each instant regardless of whether the velocity really does remain constant. ~ature We have demonstrated that the tau-margin is a 300d candidate two reasons. First, it is directly specified by simple ~roperties of the optic floH field at the eye.
Journal of Motor Behavior 14 (1982) 143-152. W~i~i~G, H. T. , E. B. Gill and J. M. Stephenson. Critical time intervals for takins in fliSht inforoation in a ball catching task. Ergonooics 13 (1970) 265-272. Lee, D. , J. R. Lishman and J. A. Thomson. Visual re3ulation of gait in long jumpinG. Journal of E~~peri"1ental Psycholoe;y: Human Perception and Perforoance 8 (1982) 448-459. Koenderink, J. , and A. J. Van Doorn. Invariant properties of the motion parallax field due to the moveoent of rigid bodies relative to an observer.