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The influence of second-order motion on the induction of vection


The influence of second-order motion on the induction of vection

Potechin, Cindy J (1998) The influence of second-order motion on the induction of vection. Masters thesis, Concordia University.

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Optical flow fields composed of spatiotemporal luminance modulations (first-order) versus spatiotemporal contrast modulations (second-order) differ in their ability to induce the illusions of motion aftereffect (MAE) and structure from motion. The inability of second-order (SO) motions to support structure from motion except in response to simple motion stimuli has led to the suggestion that SO motions cannot support computations relating to motion-in-depth. Three experiments were used to determine the ability of first-order (FO) and SO motion stimuli to induce vection, the illusion of 3-D motion induced by image flow. Subjects reported the duration and latency to onset of the MAE and vection illusions in response to stimuli composed of multiplicative combinations of a basic vection signal (radially expanding concentric rings) with three different carriers. The stimulus patterns contained different amounts of FO and SO motion energy (ME). The results indicated that a SO motion signal can induce vection but the vection responses will have slower onsets and shorter durations than those induced by a FO motion signal. As well, the vection response to the SO signal is not the result of contamination by FO artifacts, suggesting that the visual system contains a mechanism specialized for the detection of SO motions and that the activation of these mechanisms is sufficient to induce a sense of self-motion.

Divisions:Concordia University > Faculty of Arts and Science > Psychology
Item Type:Thesis (Masters)
Authors:Potechin, Cindy J
Pagination:viii, 109 p. : ill. ; 29 cm.
Institution:Concordia University
Degree Name:M.A.
Thesis Supervisor(s):Gurnsey, Rick
ID Code:566
Deposited By: Concordia University Library
Deposited On:27 Aug 2009 17:12
Last Modified:18 Jan 2018 17:14
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