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Thursday, July 9, 2020 | History

3 edition of Perceived direction of rotary motion found in the catalog.

Perceived direction of rotary motion

Jansson, Gunnar

Perceived direction of rotary motion

by Jansson, Gunnar

  • 234 Want to read
  • 40 Currently reading

Published by Dept. of Psychology, University of Uppsala in [Uppsala .
Written in English

    Subjects:
  • Motion perception (Vision),
  • Optical illusions.

  • Edition Notes

    Bibliography: leaves 25-26.

    Statementby Gunnar Jansson and Erik Börjesson.
    SeriesDept. of Psychology, University of Uppsala. Report 60
    ContributionsBörjesson, Erik, joint author.
    Classifications
    LC ClassificationsBF21.A1 U6 no. 60
    The Physical Object
    Pagination26 l.
    Number of Pages26
    ID Numbers
    Open LibraryOL4659727M
    LC Control Number77546557

    The spinning dancer illusion is a form of bistable perception that can be used to study the perception of motion and rotation. However, the underlying mechanism of such bistability is not fully. Full text of "Analysis of Rotary Motion: As Applied to the Gyroscope" See other formats Google This is a digital copy of a book that was preserved for generations on library shelves before it was carefully scanned by Google as part of a project to make the world's books discoverable online.

      This stimulus, referred to as the “racetrack,” consists of successive displays of random dots confined to an annulus. When no coherent motion exists, subjects often perceive rotary motion, which spontaneously flips in direction. Interestingly, the direction of perceived motion does not depend on the specific dot patterns by: 1.   The Fröhlich effect. In the Hess and Pulfrich illusions, it is not the motion of the object that is responsible for the apparent shift in position but the luminance contrast that determines the perceived relative positions of the objects when they are moving. Luminance contrast is not the only characteristic of moving objects that can influence their perceived by:

    This type of motion is analyzed in much the same way as linear motion. Whenever an object is referred to as having uniform rotary motion, or uniform circular motion, this means that the object's speed and direction of motion is unchanging. Objects can have variations in their rotary motion, however.   The velocity of the stimulus is adjusted in order to induce a perception of self-motion, as well as a postural sway. The direction of the stimulus is changed as soon as the induced postural sway drives the projection of the center of gravity nearly out of the foot surface, then changed again, and so on.


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Perceived direction of rotary motion by Jansson, Gunnar Download PDF EPUB FB2

The role of motion in depth perception came primarily from the reports of various illusions. The windmill, fan, and rotating trapezoid illusions are the of illusions of the misperceived direction of rotary motion.

Lissajous and stereokinetic patterns are the examples of objectively two-dimensional stimuli that elicit perceived depth. The proximal stimulation is ambiguous, however, unless some restrictions or “decoding principles” are introduced. In the first two experiments it was shown that the Ss could not report “correct” direction of motion of the point but were able to do so about the vertical line.

In a third experiment a second vertical line was by:   The book first elaborates on the paradox of depth perception, illusions of motion in depth, and optic array.

Discussions focus on rigid motions in three-dimensional space, perspective gradients, projection plane, stereokinetic effect, rotating trapezoid, and the windmill and fan illusions.

The text then examines transformations leading to the perception of depth, slant perception, and perceived direction of rotary Edition: 1. Editorial team.

General Editors: David Bourget (Western Ontario) David Perceived direction of rotary motion book (ANU, NYU) Area Editors: David Bourget Gwen Bradford. Also a second decoding principle was generally verified: rotary, but not translator motion is perceived from this kind of stimulation.

A third unexpected decoding principle was found in the data: the line is perceived in a frontal-parallel direction when it has its maximal by: rotated to the upright and that, depending on its direction, the perceived rotary motion of the object either speeded or slowed mental rotation. Perceived rotary motion did not influence naming time, which suggests that the identification of rotated objects does not involve mental rotation.

Psychonomic Bulletin & Review5 (1), Perceived Direction of Rotation Some of the studies using shadow-projection techniques to examine the conditions under which rotary motion in depth is perceived found ambiguity in the perceived direction of rotation (Miles, ; Wallach & O'Connell, ).Cited by: ELSEVIER Behavioural Brain Research 81 () BEHAVIOURAL BRAIN RESEARCH Research report Perception of direction of visual motion.

Influence of angular body acceleration and tilt R. Loose a., Th. Probst b, E.R. Wist a a Institute of Physiological Psychology IL Department of Experimental and Clinical Neuropsychology, University of Diisseldor[i D D~sseldorf Germany b Cited by: 8.

Subjects either named rotated objects or decided whether the objects would face left or right if they were upright. Response time in the left-right task was influenced by a rotation aftereffect or by the physical rotation of the object, which is consistent with the view that the objects were mentally rotated to the upright and that, depending on its direction, the perceived rotary motion of Cited by: A more recent study using angular whole-body motion about the vertical yaw and the horizontal pitch axis showed that the perception of the direction of visual motion in the horizontal plane (yaw) was impaired only when visual motion and whole-body motion directions were incongruous, i.e., in the same by: 6.

The text then examines transformations leading to the perception of depth, slant perception, and perceived direction of rotary motion.

Topics include shadow and computer projections, direct observation of rotating figures, a model of the perception of rotary motion, dynamic slant and static slant perception, translations along the Z axis, and rotations about the X or Y : Myron L.

Braunstein. Receptive Field Optical Flow Motion Perception Rotary Motion Rigid Motion. These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm improves. This is a preview of subscription content, log in to check access.

Cite by: Motion Perception, Neural Basis of although the display of random dots evokes perception of rotary motion, the direction of motion perceived does not depend on what dot pattern is shown.

Books A - Z; Journals A - Z; Videos; Browse Volumes & Issues. Attention, Perception, & Psychophysics. All Volumes & Issues. Volume 6, Issue 1, January ISSN: (Print) X (Online) In this issue (16 articles) Motion Perception.

Perceived direction of rotary motion. Gunnar Jansson, Erik Borjesson Pages Download. The text then examines transformations leading to the perception of depth, slant perception, and perceived direction of rotary motion. Topics include shadow and computer projections, direct observation of rotating figures, a model of the perception of rotary motion, dynamic slant and static slant perception, translations along the Z axis, and rotations about the X or Y axis.

However, here we measure the perceived orientation of a static windmill pattern after adaptation to rotary motion and find a gradual shift in orientation in the direction of Cited by: The Visual Perception of Three- Dimensional Structure from Motion James T.

Todd One of the most perplexing phenomena in the study of human vision is the ability of observers to perceive the three-dimensional (D) layout of the environment from patterns of light that project onto the by: Perception of objects that are translating and rotating.

February influence the perceived motion direction and can even override binocular depth cues. lesser extent by the amount of. To investigate whether self-motion similarly impairs concurrent image motion perception, we examined human perception of head-referenced horizontal image motion during head movement.

perceived motion direction is the same as true direction. This principle was demonstrated by slanting a trapezoidal window at 45 degrees from the fronto-parallel with the longer vertical edge furthest, obtaining a judgment of slant, and then rotating it through about 90 degrees to obtain a judgment of motion direction.

Kilpatrick () has. Although the display of random dots triggers perception of rotary motion, the direction of motion perceived is independent of what dot pattern is shown. The time interval between spontaneous reversals in perceived direction is lognormally distributed as is the case for most bistable by: 5.COVID Resources.

Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.One open question is whether sensitivity to virtual rotations would be altered by stimulus frequency as previously reported for real rotations (Benson et al.

; Grabherr et al. ; Soyka et al. ).Estimating the gain spectrum of virtual and real kinetic perception was accomplished by quantifying direction discrimination thresholds as a function of frequency (–2 Hz).Cited by: