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Contrast thresholds for component motion with full and poor attention

Tsuchiya, Naotsugu and Braun, Jochen (2007) Contrast thresholds for component motion with full and poor attention. Journal of Vision, 7 (3). Art. No. 1. ISSN 1534-7362. http://resolver.caltech.edu/CaltechAUTHORS:TSUjov07

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Abstract

We compare luminance-contrast-masking thresholds for fully and poorly attended stimuli, controlling attention with a demanding concurrent task. We use dynamic displays composed of discrete spatiotemporal wavelets, comparing three conditions (“single,” “parallel,” and “random”). In contrast to static displays, we do not find that attention modulates the “dipper” regime for masks of low luminance contrast. Nor does attention alter direction-selective masking by multiple wavelets moving in random directions, a condition designed to isolate effects on component motion. However, direction-selective masking by multiple wavelets moving in parallel is significantly reduced by attention. As the latter condition is expected to excite both component and pattern motion mechanisms, this implies that attention may alter the visual representation of pattern motion. In addition, attention exhibits its well-known effect of reducing lateral masking between nearby spatiotemporal wavelets.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1167/7.3.1 DOIArticle
http://www.journalofvision.org/content/7/3/1.abstractPublisherArticle
Additional Information:Copyright © 2007 by ARVO, The Association for Research in Vision and Ophthalmology. Received October 25, 2005; published February 12, 2007. We thank Geraint Rees and Christof Koch for helpful comments. N.T. was funded by grants from NIMH, NSF, the Keck Foundation, and the Moore Foundation.
Group:Koch Laboratory, KLAB
Funders:
Funding AgencyGrant Number
National Institute of Mental Health (NIMH)UNSPECIFIED
NSFUNSPECIFIED
W. M. Keck FoundationUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
NIHUNSPECIFIED
Subject Keywords:component motion, pattern motion, luminance contrast masking, detection, discrimination, attention, dual-tasks
Record Number:CaltechAUTHORS:TSUjov07
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:TSUjov07
Alternative URL:http://dx.doi.org/10.1167/7.3.1
Official Citation:Tsuchiya, N., & Braun, J. (2007). Contrast thresholds for component motion with full and poor attention. Journal of Vision, 7(3):1, 1-15, http://journalofvision.org/7/3/1/, doi:10.1167/7.3.1.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10493
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:09 May 2008
Last Modified:20 Mar 2017 22:41

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