Brightness selectivity in the motion aftereffect

Over, Ray; Broerse, Jack

doi:10.3758/bf03211195

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…This method of measuring perceived motion has been employed in several aftereffect studies, and it has been shown to have a test-retest reliability of +.83 (see Over & Broerse, 1973). Although inter-S differences are found in the overall extent of pen movement, Over and Broerse (1973) found that conversion of raw scores to a common base (e.g., percentage of largest pen displacement made by S) did not alter the overall trends found by analysis of variance. The same applied to the present data.…”

mentioning

confidence: 82%

Color-selectivity in simultaneous motion contrast

Over

Lovegrove

1973

Perception & Psychophysics

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Thirty-two Ss were required to estimate the apparent motion of stationary vertical lines viewed against a background of moving vertical lines when both patterns were seen by the same eye (monoptic conditions) or the center pattern was seen by one eye and the surrounds by the other eye (dichoptic conditions). The stationary lines appeared to be moving from right to left as the surrounds moved left to right. The simultaneous motion contrast found under monoptic conditions was maximal when the center pattern and the surrounds were the same color and was reduced when they differed in color. The surrounds had limited influence on the apparent motion of the center section under dichoptic condition, and the color relationship was no longer important. Related color selectivity has been reported for the motion aftereffect (successive motion contrast), and botb sets of data can be attributed to inhibitory interaction (simultaneous in one case and successive in the other) among neural detectors tuned to wavelength as well as the direction of image motion.

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confidence: 82%

Color-selectivity in simultaneous motion contrast

Over

Lovegrove

1973

Perception & Psychophysics

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“…Initial MAE velocity was determined over the first 10 sec, an identical period to that chosen by Day and Stretlow (1971). Considering likely cumulative effects, Over and Broerse (1973) chose a 15 sec period. More recently, investigators have used shorter initial time periods e.g.…”

Section: Apparatus and Methodsmentioning

confidence: 99%

“…This remains the simplest procedure for recording subjective movement perception capable of yielding psychophysical results. Its adaptability is reflected in its repeated use in MAE studies (Over and Broerse, 1973; Day and Wade, 1979; Keck and Price, 1982).…”

Section: Introductionmentioning

confidence: 99%

The influence of adapting velocity and luminance on the movement after-effect

Buckingham

1985

Ophthalmic and Physiological Optics

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The response of movement-sensitive mechanisms to both velocity and luminance may be investigated by means of the movement after-effect (MAE). A high contrast (98%) drifting grating having a spatial frequency of 1c deg-1 was used with four adapting velocities of 0.90, 2.87, 4.70 and 7.55 deg sec-1 to confirm their significant effect on initial MAE velocity (F = 29.83, P less than 0.01) and duration (F = 12.36, P less than 0.01). Four mean luminance levels of 4.5, 12.6, 42.9 and 126 cd m-2, spanning 1.5 log units of illumination, demonstrate its subtle effect on both initial MAE velocity (F = 4.11, P less than 0.01) and duration (F = 3.00, P less than 0.05). It is argued that adaptation of movement-sensitive mechanisms is more accurately reflected by the initial MAE velocity than its duration. The tracking technique which was employed, whilst accurate at low velocities, progressively underestimates the MAE velocity with increasing velocity. With a velocity of 1.2 deg sec-1 the under-estimate is 12%, rising to 23% at 2 deg sec-1. The tracking procedure, however, remains a reliable technique for assessing low velocity MAEs.

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The Effect of Stationary Patterns on Adaptation for Movement: Evidence for Inhibitory Interaction

Mayhew

1975

Perception

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Contingent movement aftereffects (CMAEs) can be demonstrated by adapting to a red pattern rotating clockwise (cw) alternating with a green pattern rotating counterclockwise (ccw). After 5 min subjects typically report stationary test patterns as apparently rotating clockwise when they are green and counterclockwise when they are red. Also, luminance thresholds for motion now depend on both the colour and direction of the moving pattern. The thresholds for red—cw and green—ccw motion will be relatively greater than for the opposite colour motion pairings. This is called contingent threshold elevation. When stationary dots the same colour as the moving patterns are added to the adapting stimuli, subjects report weak CMAEs but no contingent threshold elevation can be demonstrated. When stationary dots opposite in colour to the moving patterns are added to the adapting stimuli, neither CMAEs nor contingent threshold elevation can be demonstrated. And yet colour specific adaptation does occur, and can be demonstrated in the colour specificity of the simple movement aftereffect. When stationary dots are added to the adapting pattern, the simple movement aftereffect though reduced, is greatest on a test pattern of the same colour as the moving dots. These findings suggest that the CMAE, contingent threshold elevation, and the colour specificity of the movement aftereffect involves neural processes differentially sensitive to the presence of stationary patterns.

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Brightness selectivity in the motion aftereffect

Cited by 6 publications

References 20 publications

Color-selectivity in simultaneous motion contrast

Color-selectivity in simultaneous motion contrast

The influence of adapting velocity and luminance on the movement after-effect

The Effect of Stationary Patterns on Adaptation for Movement: Evidence for Inhibitory Interaction

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