Optokinetic backgrounds affect perceived velocity during ocular tracking

Raymond, Jane E.; Shapiro, Kimron L.; Rose, Debra J.

doi:10.3758/bf03206362

Cited by 56 publications

(20 citation statements)

References 11 publications

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“…An overestimation of target velocity was observed with a background of stripes moving in the direction opposite to that of the target. These results are consistent with a report by Raymond et al (1984), in which a similar technique but slightly different stimuli were used.…”

Section: Effect Of Backgroundsupporting

confidence: 92%

“…Recently, the role of efference in motion perception has been reevaluated in terms of the two oculomotor subsystems-one voluntary and one reflexive-that generate smooth tracking eye movements (Post, Schupert, & Leibowitz, 1984;Raymond et al, 1984;Whiteside, Graybiel, & Niven, 1965). Post and Leibowitz (1985) formalized these ideas into a theory that suggests that the efferent signal used in the perception of object motion is generated by activity of the voluntary tracking system and not by reflexively generated eye movements.…”

Section: Effect Of Target Sizementioning

confidence: 99%

“…Raymond, Shapiro, and Rose (1984) investigated this phenomenon by having subjects visually track and judge the velocity of a small, smoothly moving target, which was viewed against a grating pattern that was drifting in either the same or the opposite direction as the target. They found that whereas target velocity was underestimated when the target was viewed against a background of stripes moving This work was supported by a grant from NSERC.…”

mentioning

confidence: 99%

“…The velocity perception of a smoothly moving target was assessed using a technique and stimuli similar to those described by Raymond et al (1984). The target size and the direction of background motion were manipulated.…”

mentioning

confidence: 99%

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The interaction of target size and background pattern on perceived velocity during visual tracking

Raymond

1988

Perception & Psychophysics

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Section: Effect Of Backgroundsupporting

confidence: 92%

Section: Effect Of Target Sizementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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The interaction of target size and background pattern on perceived velocity during visual tracking

Raymond

1988

Perception & Psychophysics

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“…Observers perceived the dot to be moving along a diagonal path rather than along the physical (vertical) path. Illusory motion was also observed in the domain of speed perception when a moving textured background was used (Raymond, Shapiro, & Rose, 1984). For example, when a background of scattered dots moved in the same direction as a target, it was perceived to move at a slower speed than its veridical speed.…”

mentioning

confidence: 99%

Illusory motion and representational momentum

Nagai

Saiki

2005

Perception & Psychophysics

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When a moving target vanishes abruptly, participants judge its final position as being ahead of its actual final position, in the direction of motion (representational momentum;Freyd & Finke, 1984). In the present study, we presented illusory motion and examined whether or not forward displacement was affected by the perceived direction and speed of the target. Experiments 1A and 1B showed that an illusory direction of movement of a target was perceived, and Experiment 2 showed that an illusory speed of a moving target was observed. However, neither the direction nor the magnitude of forward displacement was affected by these illusions. Therefore, it was suggested that the mechanism underlying forward displacement (or some extrapolation processing) uses different motion signals than does the perceptual mechanism.

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Judging object velocity during smooth pursuit eye movements

Brenner

Berg

1994

Exp Brain Res

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Our tendency to constantly shift our gaze and to pursue moving objects with our eyes introduces obvious problems for judging objects' velocities. The present study examines how we deal with these problems. Specifically, we examined when information on rotations (such as eye movements) is obtained from retinal, and when from extra-retinal sources. Subjects were presented with a target moving across a textured background. Moving the background allowed us to manipulate the retinal information on rotation independently of the extra-retinal information. The subjects were instructed to pursue the target with their eyes. At some time during the presentation the target's velocity could change. We determined how various factors influence a subject's perception of such changes in velocity. Under more or less natural conditions, there was no change in perceived target velocity as long as the relative motion between target and background was maintained. However, experiments using conditions that are less likely to occur outside the laboratory reveal how extra-retinal signals are involved in velocity judgements.

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Optokinetic backgrounds affect perceived velocity during ocular tracking

Cited by 56 publications

References 11 publications

The interaction of target size and background pattern on perceived velocity during visual tracking

The interaction of target size and background pattern on perceived velocity during visual tracking

Illusory motion and representational momentum

Judging object velocity during smooth pursuit eye movements

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