| Perceptual unit formation in simple motion patterns. | |
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MedLine Citation:
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PMID: 8533053 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study investigated the proximal constraints that determine perceptual unit formation under minimal stimulus conditions. Projections of three moving dots, which could form two possible two-dot configurations, were presented to naive observers. In a forced-choice situation, their task was to report which two-dot configuration was perceived as a distinct perceptual unit. The results showed that common motions (arbitrary translations and rigid rotations in the frontoparallel plane) have stronger grouping as compared to different relative motions (expansion/contractions, or simultaneous expansions/contractions and deformations in the frontoparallel plane). It was found that proximal changes of distances between elements in two-dot structures reduce grouping power. Changes of proximal directions, however, did not affect unit formation in two-dot structures at all. The effect of vector algebraic combinations on grouping power in three-dot structures was also investigated. Evidently, visual vector analysis splits up motion combinations into their constituents, and in some cases this contributes to additive effects. |
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Authors:
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U Ahlström |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Scandinavian journal of psychology Volume: 36 ISSN: 0036-5564 ISO Abbreviation: Scand J Psychol Publication Date: 1995 Dec |
Date Detail:
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Created Date: 1996-01-29 Completed Date: 1996-01-29 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0404510 Medline TA: Scand J Psychol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 343-54 Citation Subset: IM |
Affiliation:
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Department of Psychology, Uppsala University, Sweden. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention* Distance Perception Female Humans Male Motion Perception* Orientation* Pattern Recognition, Visual* Psychophysics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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