A line-doubling illusion
نویسندگان
چکیده
We present a novel ‘dazzle’ illusion, in which black/white negative bar embedded grating and viewed near peripheral vision can look doubled, as if there were two bars lying side by touching each other.
منابع مشابه
Spatial structure of the frequency doubling illusion
We sought to determine (1) the perceived spatial frequency of flickering sinusoidal gratings as a function of temporal frequency at contrasts down to detection threshold levels, and (2) the influence of two different matching criteria on reported size matches to identify changes in the apparent spatial structure introduced by counterphase flicker. To determine if spatial structure was observabl...
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We examined the performance of tests for glaucoma based on the spatial frequency doubling (FD) illusion. Contrast thresholds for seeing the FD illusion in four large visual field regions were measured from 340 subjects who were tested up to seven times over 2 years. Median sensitivities of 91% at specificities of 95% were obtained. Test-retest variability for the worst hemifield thresholds aver...
متن کاملFrequency-doubling illusion under scotopic illumination and in peripheral vision.
PURPOSE The authors sought to determine whether frequency-doubling illusion (FDI) could be perceived under scotopic illumination at central and peripheral retinal locations. For comparison, perception of the FDI at the central and peripheral retina under photopic illumination was also evaluated. METHODS Five subjects matched the apparent spatial frequency of counterphase flickering sinusoidal...
متن کاملMonocular and dichoptic masking effects on the frequency doubling illusion
The purpose of this paper was to investigate the effects of both monocular and dichoptic masking on the frequency doubling (FD) illusion, using both temporal and spatial masks. Monocular spatial tuning effects occurred around the fundamental FD spatial frequency of 0.25 cycles per degree (c/deg), whereas dichoptic spatial frequency tuning effects occurred at the doubled spatial frequency of 0.5...
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ژورنال
عنوان ژورنال: Journal of Illusion
سال: 2021
ISSN: ['2436-4045']
DOI: https://doi.org/10.47691/joi.v2.7540