Changing objects lead briefly flashed ones.
Continuous, predictable events and spontaneous events may coincide in the visual environment. For a continuously moving object, the brain compensates for delays in transmission between a retinal event and neural responses in higher visual areas. Here we show that it similarly compensated for other smoothly changing features. A disk was flashed briefly during the presentation of another disk of continuously changing color, and observers compared the colors of the disks at the moment of flash. We also tested luminance, spatial frequency and pattern entropy; for all features, the continuously changing item led the flashed item in feature space. Thus the visual system's ability to compensate for delays in information about a continuously changing stimulus may extend to all features. We propose a model based on backward masking and priming to explain the phenomenon.
Sheth
B R
BR
California Institute of Technology 139-74, Pasadena, California 91125, USA. bhavin@caltech.edu
Nijhawan
R
R
Shimojo
S
S
D000222:Adaptation, Physiological / Q000502:physiology; D001288:Attention / Q000502:physiology; D003116:Color; D003118:Color Perception / Q000502:physiology*; D003198:Computer Simulation; D005364:Field Dependence-Independence; D006801:Humans; D008027:Light; D008959:Models, Neurological; D010470:Perceptual Masking / Q000502:physiology*; D010775:Photic Stimulation; D013997:Time Factors; D014793:Visual Cortex / Q000502:physiology