Illusory Shifts in Spatial Frequency Caused by Temporal Modulation
- 1 September 1975
- journal article
- research article
- Published by SAGE Publications in Perception
- Vol. 4 (3) , 331-335
- https://doi.org/10.1068/p040331
Abstract
It is known that temporal modulation of a sinusoidal grating of low spatial frequency causes an increase in the apparent spatial frequency of the grating. A possible explanation for the illusion is proposed. Temporal modulation would favour channels which respond only transiently to prolonged presentation of a grating. These channels may be the human analogues of Y-cells found in the cat retina. Y-cells respond nonlinearly to gratings, and the nonlinearity may be the root of the apparent spatial-frequency illusions.Keywords
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