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Updated: Jul 13, 2025

Assessment of Spatial Lingual Tactile Sensitivity using a Gratings Orientation Test
Published on: September 17, 2021
Human perception of spatial frequency varies with stimulus orientation and location in the visual field
Wladimir Kirsch1, Wilfried Kunde2
1Department of Psychology, University of Würzburg, Röntgenring 11, 97070, Würzburg, Germany. kirsch@psychologie.uni-wuerzburg.de.
Abstract:
Neuroanatomical variations across the visual field of human observers go along with corresponding variations of the perceived coarseness of visual stimuli. Here we show that horizontal gratings are perceived as having lower spatial frequency than vertical gratings when occurring along the horizontal meridian of the visual field, whereas gratings occurring along the vertical meridian show the exact opposite effect. This finding indicates a new peculiarity of processes operating along the cardinal axes of the visual field.
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