The analysis of the drift rate of moving sinusoidal gratings

Tolhurst, David J.; Sharpe, Colin; Hart, G J

doi:10.1016/0042-6989(73)90251-4

Cited by 75 publications

(36 citation statements)

References 23 publications

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“…Threshold elevation as we have measured it is not accompanied by any change in the perception of the visual world: low-contrast patterns become less visible, but threshold patterns have a similar appearance before and after adaptation. The movement aftereffect, on the other hand, is an effect that may only be measured perceptually (though it has other correlates: Tolhurst et al, 1973;Thompson 1976, in preparation). It may be, then, that the difference lies in the difference between threshold and suprathreshold aftereffects.…”

Section: Discussionmentioning

confidence: 99%

Storage of Spatially Specific Threshold Elevation

Thompson¹,

Movshon²

1978

Perception

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Abstract. The decay of several visual aftereffects may be prolonged by interposing a period of light-free or pattern-free viewing between adaptation and testing. We demonstrate that this storage phenomenon can be observed using the threshold elevation aftereffect that follows inspection of a high-contrast grating pattern. Control experiments comparing thresholds for vertical and horizontal gratings after adaptation to a vertical grating reveal that the stored aftereffect, like its unstored counterpart, is pattern-selective. Storage is equally pronounced with stimuli that are detected by pattern-analyzing or movement-analyzing visual channels. Unlike other aftereffects, the threshold-elevation aftereffect requires that the storage period be light-free; no storage is seen if a blank field is inspected between adaptation and testing. The results are discussed with respect to the nature of visual aftereffects, and possible cognitive or physiological models of storage.

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Section: Discussionmentioning

confidence: 99%

Storage of Spatially Specific Threshold Elevation

Thompson¹,

Movshon²

1978

Perception

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“…Tolhurst, Sharpe and Hart (1973) made very similar, but mose extensive hmeasurements with a 6.5 deg diameter display of 100 cd/m mean luminarnce.…”

Section: Non-acuity Measuresmentioning

confidence: 92%

“…For example, The continuous curve has been drawn by eye through the open circles; the dashed line has been drawn by eye through the data for 11.5 c/sec and then shifted up the sensitivity axis to fit the data for 6 c/sec (from Tolhurst, Sharpe, & Hart, 1973). , 1968).…”

Section: Research In Applied Settingsmentioning

confidence: 99%

Sourcebook of temporal factors affecting information transfer from visual displays.

Sekuler¹,

Tynan²,

Kennedy³

1981

PsycEXTRA Dataset

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“…Sensitivity to temporal modulation of sine gratings depends on spatial frequency, in that lower spatial frequencies are more visible at higher temporal frequencies (Robson 1966;Kelly 1971;Kulikowski & Tolhurst 1973;Tolhurst et al 1973). Contrast sensitivity is maximum for a drifting 3 c/deg grating stimulus at approximately 5 Hz, the so-called optimal motion stimulus (Watson & Turano 1995).…”

Section: Introductionmentioning

confidence: 99%

Critical band masking in optic flow

Bex¹,

Dakin

Mareschal

2005

Network: Computation in Neural Systems

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Visual processing has been widely investigated with narrow band stimuli at low contrasts. We used a masking paradigm to examine how visual sensitivity under these conditions compares with the perception of the direction of heading in real scenes (i.e., with dynamic natural images at high contrasts). We first confirmed and extended previous studies showing biases in the amplitude distribution for spatial frequency, temporal frequency, speed and direction in dynamic natural movies. We then measured contrast thresholds for identification of the direction of motion for an observer traveling at various speeds. In spite of differences in contrast sensitivity and large non-uniformities in the amplitude content of the stimuli, contrast thresholds were relatively invariant of spatial frequency and completely invariant of temporal frequency, speed and direction. Our results suggest that visual processing normalises responses to supra-threshold structure at different spatial and temporal frequencies within natural stimuli and so equates their effective visibility.

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The analysis of the drift rate of moving sinusoidal gratings

Cited by 75 publications

References 23 publications

Storage of Spatially Specific Threshold Elevation

Storage of Spatially Specific Threshold Elevation

Sourcebook of temporal factors affecting information transfer from visual displays.

Critical band masking in optic flow

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