scholarly journals Asymmetric transfer of the dynamic motion aftereffect between first- and second-order cues and among different second-order cues

10.1167/7.8.1 ◽  
2007 ◽  
Vol 7 (8) ◽  
pp. 1 ◽  
Author(s):  
Andrew J. Schofield ◽  
Timothy Ledgeway ◽  
Claire V. Hutchinson
Keyword(s):  
Motion Aftereffect ◽  
Second Order ◽  
Dynamic Motion

The Duration of the Motion Aftereffect following Adaptation to First-Order and Second-Order Motion

Perception ◽  
1994 ◽  
Vol 23 (10) ◽  
pp. 1211-1219 ◽  
Author(s):  
Timothy Ledgeway ◽  
Andrew T Smith
Keyword(s):  
Motion Aftereffect ◽  
Second Order ◽  
Adaptation Stimulus ◽  
Motion Patterns ◽  
First Order ◽  
Parallel Motion ◽  
Significant Difference ◽  
Cross Adaptation ◽  
Identification Threshold ◽  
Direction Opposite

The magnitude of the motion aftereffect (MAE) obtained following adaptation to first-order or to second-order motion was measured by estimating its duration. The second-order adaptation stimulus was composed of contrast-modulated noise produced by multiplying two-dimensional (2-D) noise by a drifting 1 cycle deg−1 sine grating. The first-order adaptation stimulus was composed of luminance-modulated noise produced by summing, rather than multiplying, the noise and the sine grating. The test stimuli were directionally ambiguous motion patterns composed of either two oppositely drifting sine gratings added to noise or the contrast-modulated equivalent. The adaptation and test stimuli were equated for visibility by presenting them at the same multiple of direction-identification threshold. All possible combinations of first-order and second-order adaptation and test stimuli were examined in order to compare the magnitudes of the MAEs obtained following same adaptation and cross adaptation. After adaptation the test stimuli always appeared to drift coherently in the direction opposite to that of adaptation and the magnitudes of this MAE were very similar for all conditions examined. Statistical analyses of the results showed that there was no significant difference between the durations of the MAEs obtained in the same-adaptation and cross-adaptation conditions. The cross-adaptation effects suggest that either first-order or second-order motion are detected by a common low-level mechanism, or that separate parallel motion-detecting mechanisms exist, for the two types of motion, that interact at some later stage of processing.

scholarly journals Emergent Filling In Induced by Motion Integration Reveals a High-Level Mechanism in Filling In

2012 ◽  
Vol 23 (12) ◽  
pp. 1534-1541 ◽  
Author(s):  
Zhicheng Lin ◽  
Sheng He
Keyword(s):  
Selective Attention ◽  
Visual System ◽  
Motion Aftereffect ◽  
Local Motion ◽  
Lateral Occipital Complex ◽  
Middle Temporal ◽  
Dynamic Motion ◽  
Perceptual Completion ◽  
High Level ◽  
Symbolic Processes

The visual system is intelligent—it is capable of recovering a coherent surface from an incomplete one, a feat known as perceptual completion or filling in. Traditionally, it has been assumed that surface features are interpolated in a way that resembles the fragmented parts. Using displays featuring four circular apertures, we showed in the study reported here that a distinct completed feature (horizontal motion) arises from local ones (oblique motions)—we term this process emergent filling in. Adaptation to emergent filling-in motion generated a dynamic motion aftereffect that was not due to spreading of local motion from the isolated apertures. The filling-in motion aftereffect occurred in both modal and amodal completions, and it was modulated by selective attention. These findings highlight the importance of high-level interpolation processes in filling in and are consistent with the idea that during emergent filling in, the more cognitive-symbolic processes in later areas (e.g., the middle temporal visual area and the lateral occipital complex) provide important feedback signals to guide more isomorphic processes in earlier areas (V1 and V2).

scholarly journals The dynamic motion aftereffect is driven by local motion adaptation

2010 ◽  
Vol 5 (8) ◽  
pp. 149-149
Author(s):  
W. Curran ◽  
C. P. Benton
Keyword(s):  
Motion Aftereffect ◽  
Local Motion ◽  
Motion Adaptation ◽  
Dynamic Motion

scholarly journals Separate motion-detecting mechanisms for first- and second-order patterns revealed by rapid forms of visual motion priming and motion aftereffect

2009 ◽  
Vol 9 (11) ◽  
pp. 27-27 ◽  
Author(s):  
A. Pavan ◽  
G. Campana ◽  
M. Guerreschi ◽  
M. Manassi ◽  
C. Casco
Keyword(s):  
Visual Motion ◽  
Motion Aftereffect ◽  
Second Order

scholarly journals Two temporal channels underlie the dynamic motion aftereffect

2010 ◽  
Vol 2 (7) ◽  
pp. 373-373
Author(s):  
F. A.J. Verstraten ◽  
D. Alais ◽  
D. Burr
Keyword(s):  
Motion Aftereffect ◽  
Dynamic Motion
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