| Eccentric grouping by proximity in multistable dot lattices. | |
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MedLine Citation:
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PMID: 18082239 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The Pure Distance Law predicts grouping by proximity in dot lattices that can be organised in four ways by grouping dots along parallel lines. It specifies a quantitative relationship between the relative probability of perceiving an organisation and the relative distance between the grouped dots. The current study was set up to investigate whether this principle holds both for centrally and for eccentrically displayed dot lattices. To this end, dot lattices were displayed either in central vision, or to the right of fixation with their closest border at 3 degrees or 15 degrees. We found that the Pure Distance Law adequately predicted grouping of centrally displayed dot lattices but did not capture the eccentric data well, even when the eccentric dot lattices were scaled. Specifically, a better fit was obtained when we included the possibility in the model that in some trials participants could not report an organisation and consequently responded randomly. A plausible interpretation for the occurrence of random responses in the eccentric conditions is that under these circumstances an attention shift is required from the locus of fixation towards the dot lattice, which occasionally fails to take place. When grouping could be reported, scale and eccentricity appeared to interact. The effect of the relative interdot distances on the perceptual organisation of the dot lattices was estimated to be stronger in peripheral vision than in central vision at the two largest scales, but this difference disappeared when the smallest scale was applied. |
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Authors:
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Lizzy Bleumers; Peter De Graef; Karl Verfaillie; Johan Wagemans |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-12-21 |
Journal Detail:
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Title: Vision research Volume: 48 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 2008 Jan |
Date Detail:
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Created Date: 2008-02-04 Completed Date: 2008-04-11 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: 179-92 Citation Subset: IM |
Affiliation:
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Laboratory of Experimental Psychology, Department of Psychology, Faculty of Psychology and Educational Sciences, K.U. Leuven, Tiensestraat 102, B-3000 Leuven, Belgium. Lizzy.Bleumers@jubii.nl <Lizzy.Bleumers@jubii.nl> |
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Female Fixation, Ocular / physiology Gestalt Theory Humans Male Middle Aged Models, Psychological* Pattern Recognition, Visual / physiology* Photic Stimulation / methods Psychophysics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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