Path perception and Filehne illusion compared: model and data

Freeman, Tom C. A. ORCID: https://orcid.org/0000-0002-5989-9183 1999. Path perception and Filehne illusion compared: model and data. Vision Research 39 (16) , pp. 2659-2667. 10.1016/S0042-6989(98)00293-4

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Abstract

Pursuit eye movements introduce retinal motion that complicates the recovery of self-motion from retinal flow. An extra-retinal, eye-velocity signal could be used to aid estimation of the observer’s path, perhaps by converting retino-centric into head-centric motion. This conversion is apparently not precise because we often misperceive head-centric object velocity: in the Filehne illusion, for example, a stationary object appears to move in the opposite direction to the eye movement. Similar errors should be expected when extra-retinal, eye-velocity signals are used in self-motion tasks. However, most self-motion studies conclude that path direction is recovered quite accurately. Path perception and the Filehne illusion were therefore compared directly in order to examine the apparent discrepancy. A nulling technique determined the velocity of simulated eye rotation that cancelled the perceived curvature of the path or, in a Filehne condition, the perceived rotation of the ground-plane stimulus. In either case, observers typically set the simulated eye rotation to be a fixed proportion of the actual eye pursuit made. No differences were found between path perception and Filehne illusion. The apparent inaccuracy of path perception during a real eye movement was confirmed in a second experiment, using a standard ‘mouse-pointing’ technique. The experiments provide support for a model of head-centric motion perception based on extra-retinal and retinal signals that are linearly related to pursuit and retinal speed, respectively.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Psychology
Subjects:	B Philosophy. Psychology. Religion > BF Psychology R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry R Medicine > RE Ophthalmology
Uncontrolled Keywords:	Retinal flow; Heading; Motion; Eye movements; Extra-retinal
Publisher:	Elsevier
ISSN:	0042-6989
Last Modified:	21 Oct 2022 08:59
URI:	https://orca.cardiff.ac.uk/id/eprint/34981

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