Spatial frequency tuning studies: Weighting as a prerequisite for describing psychometric curves by probability summation

Kroon, JN Johannes; Wildt, GJ van der

doi:10.1016/0042-6989(80)90110-8

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…However, they do not show the Form one would expect based on the ~sum~tion of tuning, as measured by Bryngdaht (1966), and as needed to describe the visibility of gratings in an equal luminance surround. as a function of the width of the grating (for a further discussion on this see Kroon and van der Wildt, 1980). In our opinion, however, the results of Figs 2 and 3 do not necessarily preclude the existence of tuning.…”

Section: Resultsmentioning

confidence: 46%

“…This effect can be eliminated by using two-dimensiona gratings. The results of a study which used such twodimensional gratings were described elsewhere (Rijsdijk, Kroon and van der Wildt (1980).…”

Section: Resultsmentioning

confidence: 99%

“…and van der Wildt, 1980). These measurements can be Such a curve would have maximum contrast sensidescribed by assuming probability summation, and using a weighting function with its maximum outside the fovea (tuning).…”

Section: Resultsmentioning

confidence: 99%

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Peripheral contrast sensitivity for sine-wave gratings and single periods

1980

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Section: Resultsmentioning

confidence: 46%

Section: Resultsmentioning

confidence: 99%

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Peripheral contrast sensitivity for sine-wave gratings and single periods

1980

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“…Importantly, visual performance varies not only across eccentricity, but also as a function of polar angle ( Figure 1 ); at matched eccentricity, performance is better along the horizontal than the vertical meridian (horizontal-vertical asymmetry, or ‘anisotropy’; HVA) and better along the lower than the upper vertical meridian (vertical meridian asymmetry; VMA) ( Carrasco et al, 2001 ; Cameron et al, 2002 ; Montaser-Kouhsari and Carrasco, 2009 ; Corbett and Carrasco, 2011 ; Abrams et al, 2012 ; Baldwin et al, 2012 ; Greenwood et al, 2017 ; Himmelberg et al, 2020 ; Barbot et al, 2021 ). These asymmetries are present in several basic perceptual dimensions, including contrast sensitivity ( Rovamo and Virsu, 1979 ; Kroon and van der Wildt, 1980 ; Robson and Graham, 1981 ; Regan and Beverley, 1983 ; Pointer and Hess, 1989 ; Carrasco et al, 2001 ; Cameron et al, 2002 ; Fuller et al, 2008 ; Corbett and Carrasco, 2011 ; Abrams et al, 2012 ; Baldwin et al, 2012 ; Rosén et al, 2014 ; Himmelberg et al, 2020 ; Purokayastha et al, 2021 ) and spatial resolution ( Anderson et al, 1992 ; Mackeben, 1999 ; Altpeter et al, 2000 ; Carrasco et al, 2002 ; Talgar and Carrasco, 2002 ; Montaser-Kouhsari and Carrasco, 2009 ; Wilkinson et al, 2016 ; Greenwood et al, 2017 ; Barbot et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Cortical magnification in human visual cortex parallels task performance around the visual field

Benson

Kupers

Barbot

et al. 2021

eLife

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Human vision has striking radial asymmetries, with performance on many tasks varying sharply with stimulus polar angle. Performance is generally better on the horizontal than vertical meridian, and on the lower than upper vertical meridian, and these asymmetries decrease gradually with deviation from the vertical meridian. Here we report cortical magnification at a fine angular resolution around the visual field. This precision enables comparisons between cortical magnification and behavior, between cortical magnification and retinal cell densities, and between cortical magnification in twin pairs. We show that cortical magnification in human primary visual cortex, measured in 163 subjects, varies substantially around the visual field, with a pattern similar to behavior. These radial asymmetries in cortex are larger than those found in the retina, and they are correlated between monozygotic twin pairs. These findings indicate a tight link between cortical topography and behavior, and suggest that visual field asymmetries are partly heritable.

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“…This effect of number of cycles in the stimulus has been attributed to probability summation across a population of independent detectors that are spatially distributed in the visual field. 4,9,10 Improvements in contrast sensitivity achieved by increasing the number of cycles in the stimulus yields a corresponding increase in spatial resolution for foveal vision. 1,12 This is to be expected if we conceive of resolution acuity as that spatial frequency for which contrast sensitivity falls to unity.…”

Section: Introductionmentioning

confidence: 99%

Effect of window size on detection acuity and resolution acuity for sinusoidal gratings in central and peripheral vision

1996

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Detection and resolution of square patches of sinusoidal gratings were measured in central and peripheral vision (30 degrees horizontal temporal visual field) for high-contrast gratings as a function of the number of cycles in the stimulus. We determined performance in a forced-choice paradigm for a fixed number of stimulus cycles by arranging for stimulus diameter to vary inversely with spatial frequency. For both psychophysical tasks and for both target locations, the psychometric function relating performance to log spatial frequency shifted to higher frequencies without changing slope significantly as the number of cycles in the stimulus was increased. Thus the entire effect could be captured by an analysis of spatial acuity, which increased with increasing number of grating cycles over the range 0.5-6 cycles but remained constant over the range 6-14 cycles. In the central field, resolution acuity and detection acuity were equal regardless of the number of cycles in the stimulus. In the peripheral field, detection acuity exceeded resolution acuity and perceptual aliasing occurred for stimuli in the range 1-14 cycles. From this result we conclude that resolution acuity is sampling limited in the periphery, provided that the stimulus contains at least one full cycle of the grating. Essential features of the results could be accounted for by Fourier analysis of the stimulus.

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Spatial frequency tuning studies: Weighting as a prerequisite for describing psychometric curves by probability summation

Cited by 8 publications

References 9 publications

Peripheral contrast sensitivity for sine-wave gratings and single periods

Peripheral contrast sensitivity for sine-wave gratings and single periods

Cortical magnification in human visual cortex parallels task performance around the visual field

Effect of window size on detection acuity and resolution acuity for sinusoidal gratings in central and peripheral vision

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