Perceived direction of moving two-dimensional patterns depends on duration, contrast and eccentricity

Yo, Christopher; Wilson, Hugh R.

doi:10.1016/0042-6989(92)90121-x

Cited by 185 publications

(105 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of course our use of the word "salience" is a circumlocution for a host of possible experimental conditions or task demands. For example Yo and Wilson (1990) recently reported that Type II plaids appear to move close to the vector sum direction when viewed in the periphery or briefly in the fovea. De Valois and De Valois (1990) also reported differences in global organization for peripheral and foveal viewing of the similar moving patterns composed of moving patches of luminance modulated in the form of Gabor functions.…”

Section: Globally Coherent Molionmentioning

confidence: 99%

The perception of globally coherent motion

Mingolla¹,

1992

View full text Add to dashboard Cite

Section: Globally Coherent Molionmentioning

confidence: 99%

The perception of globally coherent motion

Mingolla¹,

1992

View full text Add to dashboard Cite

“…Yo and Wilson (1992) found that for short durations (60 ms), Type II plaids (plaids for which the IOC direction is not between the component directions) are perceived to move in the VA direction, while at longer dura-tions (150 ms), they are perceived to move in the IOC direction. Although they did not measure eye movements, these psychophysical results combined with Lisberger and Ferrera's (1997) pursuit results raise the interesting possibility that an early motion signal in the VA direction is used to drive the initial components of both pursuit and perception.…”

Section: Vector Averaging For Pursuit and Perceptionmentioning

confidence: 99%

“…Yo and Wilson (1992) showed that both very low contrast Type II plaids and plaids moving in the periphery produce large perceptual biases toward the VA direction. Wilson and Kim (1994) found that nonFourier (drifting beats) Type II plaids also produced large VA biases in the perceived direction even for 1-s durations.…”

Section: Vector Averaging For Pursuit and Perceptionmentioning

confidence: 99%

Motion coherence affects human perception and pursuit similarly

Beutter

Stone

2000

Vis Neurosci

View full text Add to dashboard Cite

Pursuit and perception both require accurate information about the motion of objects. Recovering the motion of objects by integrating the motion of their components is a difficult visual task. Successful integration produces coherent global object motion, while a failure to integrate leaves the incoherent local motions of the components unlinked. We compared the ability of perception and pursuit to perform motion integration by measuring direction judgments and the concomitant eye-movement responses to line-figure parallelograms moving behind stationary rectangular apertures. The apertures were constructed such that only the line segments corresponding to the parallelogram's sides were visible; thus, recovering global motion required the integration of the local segment motion. We investigated several potential motion-integration rules by using stimuli with different object, vector-average, and line-segment terminator-motion directions. We used an oculometric decision rule to directly compare direction discrimination for pursuit and perception. For visible apertures, the percept was a coherent object, and both the pursuit and perceptual performance were close to the object-motion prediction. For invisible apertures, the percept was incoherently moving segments, and both the pursuit and perceptual performance were close to the terminator-motion prediction. Furthermore, both psychometric and oculometric direction thresholds were much higher for invisible apertures than for visible apertures. We constructed a model in which both perception and pursuit are driven by a shared motion-processing stage, with perception having an additional input from an independent static-processing stage. Model simulations were consistent with our perceptual and oculomotor data. Based on these results, we propose the use of pursuit as an objective and continuous measure of perceptual coherence. Our results support the view that pursuit and perception share a common motion-integration stage, perhaps within areas MT or MST.

show abstract

“…Clearly, some aspects of plaid motion processing depend on stimulus duration, particularly when stimulus contrast is low. For example, Yo and Wilson (1992) have shown that the perceived direction of coherent motion in plaids is duration dependent, presumably owing to different latencies in the processing of first-and second-order motion components in the stimulus. The results of our simulations suggest that the model, in some cases, may slightly underestimate the contribution of static transparency cues in moving plaid perception.…”

Section: Discussionmentioning

confidence: 99%