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Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

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Published on: October 27, 2016

Dynamic distortion of visual position representation around moving objects.

Katsumi Watanabe¹, Kenji Yokoi

¹Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo, Japan. kw@fennel.rcast.u-tokyo.ac.jp

Journal of Vision

|May 20, 2008

Summary

Visual perception of object position is distorted by motion. This study reveals that the perceived location of a flashed item is anisotropically shifted by a moving object, differing in front versus behind the object.

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Area of Science:

Visual Perception
Cognitive Neuroscience
Psychophysics

Background:

Motion signals systematically alter the perceived visual positions of briefly flashed stimuli.
Previous research indicated a two-dimensional distortion in relative-position representations between moving and flashed items.
Perceived flash position is displaced towards a convergent point along a moving object's trajectory, not uniformly.

Purpose of the Study:

To investigate the temporal dynamics of anisotropic visual position distortion caused by moving objects.
To determine if the spatial and temporal characteristics of this mislocalization are homogeneous or heterogeneous.

Main Methods:

Observers fixated on a stationary cross while a black disk moved horizontally and disappeared.
A white dot was flashed at varying positions relative to the moving disk and timings relative to its motion.
The temporal pattern of anisotropic mislocalization was analyzed.

Main Results:

The temporal pattern of anisotropic mislocalization showed distinct emerging and waning phases.
Position representation ahead of the moving object qualitatively differs from that behind it.
The observed mislocalization cannot be explained by spatially or temporally homogeneous processes.

Conclusions:

Visual position representation is anisotropically influenced by moving objects in both space and time.
The findings challenge homogeneous models of visual spatial and temporal processing.
Moving objects exert a complex, non-uniform influence on how we perceive visual locations.