Accession Number : AD0781334

Title :   Spatial Sensitization by Sinusoidally Modulated Backgrounds.

Descriptive Note : Technical rept.,

Corporate Author : ROCHESTER UNIV N Y CENTER FOR VISUAL SCIENCE

Personal Author(s) : Nelson,Michael A.

Report Date : MAY 1974

Pagination or Media Count : 63

Abstract : The response of the visual system to increment flashes presented on sinusoidally flickering backgrounds is not linear in relation to the stimulus conditions employed in these experiments. The mechanisms which determine increment thresholds on flickering backgrounds have many characteristics which are similar to the receptive field organization of retinal ganglion cells. A model of sensitization based on the disturbing influence on increment thresholds of nearby contours does not appear to be consistent with these data, whereas center-surround models appear to account for the data well.

Descriptors :   *Spatial distribution, *Psychophysics, *Visual perception, Stimuli, Psychophysiology, Sensitizing, Thresholds(Physiology), Retina, Light, Flashes

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE