Where did the time go? Temporal factors in apparent motion path choice

1991 ◽  
Author(s):  
Maggie Shiffrar ◽  
Jennifer J. Freyd
Keyword(s):  
Apparent Motion ◽  
Motion Path ◽  
Temporal Factors

scholarly journals Classification of apparent motion percepts based on temporal factors

2008 ◽  
Vol 8 (4) ◽  
pp. 31 ◽  
Author(s):  
Vebjørn Ekroll ◽  
Franz Faul ◽  
Jürgen Golz
Keyword(s):  
Apparent Motion ◽  
Temporal Factors

scholarly journals Direction of Apparent Motion During Smooth Pursuit Is Determined Using a Mixture of Retinal and Objective Proximities

i-Perception ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 204166952093732
Author(s):  
Masahiko Terao ◽  
Shin’ya Nishida
Keyword(s):  
Apparent Motion ◽  
Smooth Pursuit ◽  
Visual Motion ◽  
Motion Path ◽  
Motion Processing ◽  
Motion Direction ◽  
Jump Size ◽  
Perceptual Stability ◽  
Visual Motion Processing ◽  
Selection Of

Many studies have investigated various effects of smooth pursuit on visual motion processing, especially the effects related to the additional retinal shifts produced by eye movement. In this article, we show that the perception of apparent motion during smooth pursuit is determined by the interelement proximity in retinal coordinates and also by the proximity in objective world coordinates. In Experiment 1, we investigated the perceived direction of the two-frame apparent motion of a square-wave grating with various displacement sizes under fixation and pursuit viewing conditions. The retinal and objective displacements between the two frames agreed with each other under the fixation condition. However, the displacements differed by 180 degrees in terms of phase shift, under the pursuit condition. The proportions of the reported motion direction between the two viewing conditions did not coincide when they were plotted as a function of either the retinal displacement or of the objective displacement; however, they did coincide when plotted as a function of a mixture of the two. The result from Experiment 2 showed that the perceived jump size of the apparent motion was also dependent on both retinal and objective displacements. Our findings suggest that the detection of the apparent motion during smooth pursuit considers the retinal proximity and also the objective proximity. This mechanism may assist with the selection of a motion path that is more likely to occur in the real world and, therefore, be useful for ensuring perceptual stability during smooth pursuit.

scholarly journals Internalization: A metaphor we can live without

2001 ◽  
Vol 24 (4) ◽  
pp. 618-625 ◽  
Author(s):  
Michael Kubovy ◽  
William Epstein
Keyword(s):  
Natural Selection ◽  
Apparent Motion ◽  
Evolutionary History ◽  
Motion Path ◽  
The World ◽  
Kinematic Geometry ◽  
Innate Knowledge ◽  
History Of ◽  
The Mind ◽  
Internal Knowledge

Shepard has supposed that the mind is stocked with innate knowledge of the world and that this knowledge figures prominently in the way we see the world. According to him, this internal knowledge is the legacy of a process of internalization; a process of natural selection over the evolutionary history of the species. Shepard has developed his proposal most fully in his analysis of the relation between kinematic geometry and the shape of the motion path in apparent motion displays. We argue that Shepard has made a case for applying the principles of kinematic geometry to the perception of motion, but that he has not made the case for injecting these principles into the mind of the percipient. We offer a more modest interpretation of his important findings: that kinematic geometry may be a model of apparent motion. Inasmuch as our recommended interpretation does not lodge geometry in the mind of the percipient, the motivation of positing internalization, a process that moves kinematic geometry into the mind, is obviated. In our conclusion, we suggest that cognitive psychologists, in their embrace of internal mental universals and internalization may have been seduced by the siren call of metaphor.

scholarly journals Color updating on the apparent motion path

2014 ◽  
Vol 14 (14) ◽  
pp. 8-8 ◽  
Author(s):  
E. Chong ◽  
S. W. Hong ◽  
W. M. Shim
Keyword(s):  
Apparent Motion ◽  
Motion Path

Temporal Factors for Vibrotactile Letter Reading

1995 ◽  
Vol 80 (3_suppl) ◽  
pp. 1069-1070 ◽  
Author(s):  
Yutaka Shimizu
Keyword(s):  
Apparent Motion ◽  
Apparent Movement ◽  
Temporal Parameters ◽  
Temporal Factors ◽  
Motion Mode

Using an apparent-motion mode, the psychophysical effect of apparent movement was introduced for tactile letter reading. This mode reduces time for the tracing mode. Five temporal parameters were examined for application to actual communication. 4 subjects recognized words composed of 3 to 7 Japanese letters in about 5 seconds.

scholarly journals Apparent motion distorts the shape of a stimulus briefly presented along the motion path

2010 ◽  
Vol 10 (13) ◽  
pp. 15-15 ◽  
Author(s):  
S. K. Khuu ◽  
J. Phu ◽  
S. Khambiye
Keyword(s):  
Apparent Motion ◽  
Motion Path

scholarly journals S6-2: Neural Representation in the Apparent Motion Path

i-Perception ◽  
10.1068/if604 ◽  
2012 ◽  
Vol 3 (9) ◽  
pp. 604-604
Author(s):  
Won Mok Shim
Keyword(s):  
Apparent Motion ◽  
Neural Representation ◽  
Motion Path

scholarly journals Cortical suppressive waves shape the representation of long-range apparent motion

2018 ◽  
Author(s):  
S Chemla ◽  
A Reynaud ◽  
M di Volo ◽  
Y Zerlaut ◽  
L Perrinet ◽  
...  
Keyword(s):  
Apparent Motion ◽  
Gain Control ◽  
Motion Path ◽  
Object Identity ◽  
Temporal Separation ◽  
Cortical Dynamics ◽  
Population Responses ◽  
Temporal Succession ◽  
Spatio Temporal ◽  
The Brain

SummaryHow does the brain link visual stimuli across space and time? Visual illusions provide an experimental paradigm to study these processes. When two stationary dots are flashed in close spatial and temporal succession, human observers experience a percept of motion. Large spatio-temporal separation challenges the visual system to keep track of object identity along the apparent motion path. Here, we utilize voltage-sensitive dye imaging in primary visual cortex (V1) of the awake monkey to investigate whether intra-cortical connections within V1 can shape cortical dynamics to represent the illusory motion. We find that the arrival of the second stimulus in V1 creates a suppressive wave traveling toward the retinotopic representation of the first. Computational approaches show that this suppressive wave can be explained by recurrent gain control fed by the intra-cortical network and contributes to precisely encode the expected motion velocity. We suggest that non-linear intra-cortical dynamics preformat population responses in V1 for optimal read-out by downstream areas.

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