Levelt’s laws do not predict perception when luminance- and contrast-modulated stimuli compete during binocular rivalry

Skerswetat, Jan and Formankiewicz, Monika A. and Waugh, Sarah J. (2018) Levelt’s laws do not predict perception when luminance- and contrast-modulated stimuli compete during binocular rivalry. Scientific Reports, 2018 (8). p. 14432. ISSN 2045-2322

[img]
Preview
Text
Published Version
Available under the following license: Creative Commons Attribution Non-commercial No Derivatives.

Download (2MB) | Preview
Official URL: http://dx.doi.org/10.1038/s41598-018-32703-9

Abstract

Incompatible patterns viewed by each of the two eyes can provoke binocular rivalry, a competition of perception. Levelt’s first law predicts that a highly visible stimulus will predominate over a less visible stimulus during binocular rivalry. In a behavioural study, we made a counterintuitive observation: low visibility patterns can predominate over high visibility patterns. Our results show that none of Levelt’s binocular rivalry laws hold when luminance-modulated (LM) patterns compete with contrast-modulated (CM) patterns. We discuss visual saliency, asymmetric feedback, and a combination of both as potential mechanisms to explain the CM versus LM findings. Competing orthogonal LM stimuli do follow Levelt’s laws, whereas only the first two laws hold for competing CM stimuli. The current results provide strong psychophysical evidence for the existence of separate processing stages for LM and CM stimuli.

Item Type: Journal Article
Keywords: Binocular rivalry, Levelt's laws, Contrast-modulated, Luminance-modulated, Visual competition
Faculty: Faculty of Science & Technology
Depositing User: Dr Jan Skerswetat
Date Deposited: 12 Sep 2018 12:47
Last Modified: 16 Jul 2019 09:29
URI: http://arro.anglia.ac.uk/id/eprint/703567

Actions (login required)

Edit Item Edit Item