Spatiotemporal Balance in Competing Apparent Motion is Not Predicted from the Strength of the Single-Motion Percept

Kazuhiro Sakamoto; Takayuki Sugiura; Toshihiko Kaku; Toru Onizawa; Masafumi Yano

doi:10.1068/p5413

Spatiotemporal Balance in Competing Apparent Motion is Not Predicted from the Strength of the Single-Motion Percept

Perception ◽

10.1068/p5413 ◽

2006 ◽

Vol 35 (7) ◽

pp. 947-957 ◽

Cited By ~ 1

Author(s):

Kazuhiro Sakamoto ◽

Takayuki Sugiura ◽

Toshihiko Kaku ◽

Toru Onizawa ◽

Masafumi Yano

Keyword(s):

Apparent Motion ◽

Motion Percept

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Temporal Properties of Apparent Motion in Subjective Figures

Perception ◽

10.1068/p170729 ◽

1988 ◽

Vol 17 (6) ◽

pp. 729-736 ◽

Cited By ~ 15

Author(s):

George Mather

Keyword(s):

Apparent Motion ◽

Motion Detection ◽

Time Interval ◽

Temporal Properties ◽

Motion Process ◽

Motion Percept ◽

High Level ◽

Level Process

In ‘Kanizsa’ figures, vivid subjective shapes are seen in the absence of explicit contours to define them. When two or more such figures are presented sequentially, so that the subjective shape occupies different positions, good apparent motion of the shape is usually reported. This motion percept must be mediated by a high-level process, in which form extraction precedes motion detection. Some spatial and temporal properties of this motion process are investigated. A major finding is that motion is only perceived when the time interval between successive frames falls below about 500 ms, and the duration of each frame exceeds about 80 ms.

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Multiplicative Effects of Intention on the Perception of Bistable Apparent Motion

Psychological Science ◽

10.1111/1467-9280.00242 ◽

2000 ◽

Vol 11 (3) ◽

pp. 202-209 ◽

Cited By ~ 36

Author(s):

Satoru Suzuki ◽

Mary A. Peterson

Keyword(s):

Apparent Motion ◽

The Other ◽

Perceptual Representation ◽

Sensory Inputs ◽

Motion Percept ◽

Multiplicative Effects

When viewing ambiguous displays, observers can, via intentional efforts, affect which perceptual interpretation they perceive. Specifically, observers can increase the probability of seeing the desired percept. Little is known, however, about how intentional efforts interact with sensory inputs in exerting their effects on perception. In two experiments, the current study explored the possibility that intentional efforts might operate by multiplicatively enhancing the stimulus-based activation of the desired perceptual representation. Such a possibility is suggested by recent neurophysiological research on attention. In support of this idea, when we presented bistable apparent motion displays under stimulus conditions differentially favoring one motion percept over the other, observers' intentional efforts to see a particular motion were generally more effective under conditions in which stimulus factors favored the intended motion percept.

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Metastable motion anisotropy

Visual Neuroscience ◽

10.1017/s0952523800009706 ◽

1991 ◽

Vol 7 (5) ◽

pp. 397-407 ◽

Cited By ~ 31

Author(s):

Avi Chaudhuri ◽

Donald A. Glaser

Keyword(s):

Apparent Motion ◽

Signal Transmission ◽

Vertical Motion ◽

Simultaneous Presentation ◽

Horizontal Axis ◽

Vertical Meridian ◽

Motion Signal ◽

Horizontal Length ◽

Motion Percept ◽

The Brain

AbstractThe phenomenon of apparent motion can arise when two spatially separated visual tokens are presented in temporal sequence. If tokens at opposite corners of a hypothetical square are presented simultaneously followed by simultaneous presentation of tokens at the remaining two corners, an apparent motion percept may occur along either the vertical or horizontal axis. The display is perceptually metastable since most observers will perceive motion along only one axis at a time. The metastable display, however, produces anisotropic results, in that with central fixation, vertical motion is seen more frequently than horizontal motion. The ratio of the vertical to horizontal length of the sides of a rectangle needed to achieve equal frequencies of motion judgments along the respective axes falls in the range of 1.18–1.92 for different observers in our experiments. It appears that signal transmission across the vertical midline is a major determinant of the vertical bias, since the anisotropic effects disappear when the fixation point is sufficiently offset along the horizontal meridian so as to cause a fully homonymous representation of all of the metastable tokens. One of the factors may be signal degradation or delay in callosal transmission which could reduce the strength of the motion signal along the horizontal axis. In addition, there appears to be a strip along the vertical midline with a width of 30–50 min are within which reduced levels of anisotropy are found. The possibility that this strip is a consequence of a zone of naso-temporal overlap in the projection of the retina to the brain along the vertical meridian will be discussed.

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