| Center-surround effects on perceived speed. | |
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MedLine Citation:
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PMID: 20600233 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We investigated whether center-surround interactions affect perceived speed in a manner similar to their effects on direction discrimination thresholds [e.g. Tadin, D., Lappin, J. S., Gilroy, L. A., & Blake, R. (2003). Perceptual consequences of center-surround antagonism in visual motion processing. Nature, 424, 312-315]. Observers were asked to match the speed of a test stimulus (a grating, with fixed contrast and no surround) to that of a reference stimulus of variable contrast and with a variably sized surround, moving at one of two possible velocities (1 and 12cps). At 1-cps, both lowering contrast and increasing surround-size resulted in a decrease in perceived speed, except for very low contrast stimuli, where a larger surround resulted in an increase in perceived speed. Although the effect of surround-size was comparable in the two velocity conditions, the effect of contrast was different at 12-cps. That is, in the 12cps condition, a decrease in perceived speed was observed only for the lowest contrast used. Our results suggest that, at least for the lower velocity used, center-surround interactions affect perceived speed in a manner analogous to their effect on direction discrimination. |
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Authors:
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Maarten J van der Smagt; Frans A J Verstraten; Chris L E Paffen |
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Publication Detail:
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Type: Journal Article Date: 2010-06-25 |
Journal Detail:
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Title: Vision research Volume: 50 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 1900-4 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Utrecht University, Helmholtz Institute, Experimental Psychology Division, Heidelberglaan 2, 3584 CS Utrecht, Netherlands. M.J.vanderSmagt@uu.nl |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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