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

Local and Global Properties of Motion Aftereffects

Perception ◽  
1996 ◽  
Vol 25 (1_suppl) ◽  
pp. 170-170
Author(s):  
N J Wade ◽  
V Pardieu ◽  
M T Swanston
Keyword(s):  
Vision Research ◽  
Motion Aftereffect ◽  
Test Display ◽  
Adaptation Process ◽  
Local Motion ◽  
Motion Adaptation ◽  
Global Properties ◽  
Differential Adaptation ◽  
Induced Motion ◽  
Motion Aftereffects

The local motion adaptation at the basis of the motion aftereffect (MAE) can be expressed in a variety of ways, depending upon the structure of the test display (N J Wade, L Spillmann, M T Swanston Vision Research in press). This has been demonstrated with MAEs from induced motion: if adaptation is to two moving (Surround) gratings, an MAE is seen in the central grating if two gratings surround it, but in the flanking gratings when they are themselves surrounded in the test stimulus. We report two experiments in which the characteristics of the test display and of the local adaptation process have been examined. In experiment 1, five vertical gratings were presented during adaptation; the outermost and central gratings remained stationary and those flanking the centre moved laterally. The test display always consisted of three stationary gratings: either the central three or the lower three equivalent to the locations of the adaptation display. MAEs were only recorded in the Centre and not in the Surround, irrespective of whether the Centre or Surround had been exposed to motion during adaptation. MAEs in the Centre were in opposite directions, reflecting the influence of Surround adaptation. The influence of adapting motion in different directions was examined in experiment 2. The upper grating always received the same direction of motion during adaptation, and the lower grating was absent, stationary, or moving in the same or in the opposite direction. The results indicate that an MAE is visible in the upper grating only after differential adaptation between the upper and lower gratings.

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 involvement of local motion adaptation in global motion aftereffect

2010 ◽  
Vol 8 (6) ◽  
pp. 1036-1036
Author(s):  
Y. Nakajima ◽  
T. Sato
Keyword(s):  
Motion Aftereffect ◽  
Global Motion ◽  
Local Motion ◽  
Motion Adaptation

scholarly journals Local motion adaptation enhances the representation of spatial structure at EMD arrays

2017 ◽  
Vol 13 (12) ◽  
pp. e1005919 ◽  
Author(s):  
Jinglin Li ◽  
Jens P. Lindemann ◽  
Martin Egelhaaf
Keyword(s):  
Spatial Structure ◽  
Local Motion ◽  
Motion Adaptation

scholarly journals Motion adaptation shifts apparent position without the motion aftereffect

2003 ◽  
Vol 65 (7) ◽  
pp. 1011-1018 ◽  
Author(s):  
David Whitney ◽  
Patrick Cavanagh
Keyword(s):  
Motion Aftereffect ◽  
Motion Adaptation ◽  
Apparent Position

scholarly journals Illusory Increases in Font Size Improve Letter Recognition

2017 ◽  
Vol 28 (8) ◽  
pp. 1180-1188 ◽  
Author(s):  
Martin Lages ◽  
Stephanie C. Boyle ◽  
Rob Jenkins
Keyword(s):  
Visual Acuity ◽  
Visual Stimulus ◽  
Motion Aftereffect ◽  
Letter Recognition ◽  
Visual Performance ◽  
Cortical Processing ◽  
Font Size ◽  
Motion Adaptation ◽  
Sensory Encoding

Visual performance of human observers depends not only on the optics of the eye and early sensory encoding but also on subsequent cortical processing and representations. In two experiments, we demonstrated that motion adaptation can enhance as well as impair visual acuity. Observers who experienced an expanding motion aftereffect exhibited improved letter recognition, whereas observers who experienced a contracting motion aftereffect showed impaired letter recognition. We conclude that illusory enlargement and shrinkage of a visual stimulus can modulate visual acuity.

scholarly journals A new form of motion aftereffect in transparent motion adaptation

2011 ◽  
Vol 11 (11) ◽  
pp. 702-702
Author(s):  
A. L. F. Lee ◽  
H. Lu
Keyword(s):  
Motion Aftereffect ◽  
Motion Adaptation ◽  
Transparent Motion ◽  
New Form

scholarly journals Test stimulus characteristics determine the perceived speed of the dynamic motion aftereffect

2006 ◽  
Vol 46 (19) ◽  
pp. 3284-3290 ◽  
Author(s):  
William Curran ◽  
Christopher P. Benton
Keyword(s):  
Test Stimulus ◽  
Motion Aftereffect ◽  
Dynamic Motion ◽  
Perceived Speed

scholarly journals Attention and the motion aftereffect

2019 ◽  
Vol 72 (12) ◽  
pp. 2848-2864 ◽  
Author(s):  
Michael J Morgan ◽  
Joshua A Solomon
Keyword(s):  
Time Course ◽  
Reaction Times ◽  
Motion Aftereffect ◽  
Movement Direction ◽  
Search Performance ◽  
Motion Adaptation ◽  
Test Array ◽  
Percent Correct ◽  
Search Speed ◽  
The One

We measured the effects of attentional distraction on the time course and asymptote of motion adaptation strength, using visual search performance (percent correct and reaction time). In the first two experiments, participants adapted to a spatial array of moving Gabor patches, either all vertically oriented (Experiment 1) or randomly oriented (Experiment 2). On each trial, the adapting array was followed by a test array in which all of the test patches except one were identical in orientation and movement direction to their retinotopically corresponding adaptors, but the target moved in the opposite direction to its adaptor. Participants were required to identify the location of the changed target with a mouse click. The ability to do so increased with the number of adapting trials. Neither search speed nor accuracy was affected by an attentionally demanding conjunction task at the fixation point during adaptation, suggesting low-level (preattentive) sites in the visual pathway for the adaptation. In Experiment 3, the same participants were required to identify the one element in the test array that was slowly moving. Reaction times in this case were elevated following adaptation, but once again there was no significant effect of the distracting task upon performance. In Experiment 4, participants were required to make eye movements, so that retinotopically corresponding adaptors could be distinguished from spatiotopically corresponding adaptors. Performance in Experiments 1 and 2 correlated positively with reaction times in Experiment 3, suggesting a general trait for adaptation strength.

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