9419387

Source:http://linkedlifedata.com/resource/pubmed/id/9419387

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0026597, umls-concept:C0524637, umls-concept:C1704259, umls-concept:C1705987
pubmed:issue	1
pubmed:dateCreated	1998-2-18
pubmed:abstractText	How are second-order (texture-defined) and third-order (pattern-tracking) motions processed in our brains? As shown here in the context of an ambiguous motion task involving a nominal second-order stimuli first devised by Werkhoven et al., [Werkhoven, P., Sperling, G. & Chubb, C. (1993) Vision Res. 33, 463-485.], the observers fell into two distinct groups based on the direction of perceived motion. The differences were interpreted in terms of the algorithms used to extract motion: one group by using a second-order motion process and the other by using a third-order motion process. This was investigated further using a dual-task paradigm in which the interference between two tasks indicated the nature of processing involved. Observers who used third-order motion processing experienced interference with letter recognition and a more severe interference in dual third-order motion tasks. Observers who used second-order motion processing experienced interference with another second-order motion detection but not with letter recognition. Insofar as task interference implies the need for attention, the complex interference effects and the apparently paradoxical interference effects of second-order motion perception imply that there are multiple forms of attention. Whether two tasks interfere depends on whether they require the same form of attention. Insofar as spatio-temporal processing is assumed to be carried out in the dorsal stream and pattern recognition in the ventral stream, the interference patterns suggest that second-order motion may be computed entirely in the dorsal stream, and third-order motion may involve two computational processes, one of which shares computational resources with the letter recognition task in the ventral stream.
pubmed:commentsCorrections	http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-1633129, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-1941299, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-2367172, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-2471327, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-2987317, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-3001243, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-3047584, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-3316524, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-4632974, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-5119104, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-6520628, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-683341, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-6864242, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-6864243, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-694536, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-7483311, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-7675109, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-8255704, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-8283251, http://linkedlifedata.com/resource/pubmed/commentcorrection/9419387-8503196
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/7505876
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Jan
pubmed:issn	0027-8424
pubmed:author	pubmed-author:HoC ECE
pubmed:issnType	Print
pubmed:day	6
pubmed:volume	95
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	400-4
pubmed:dateRevised	2009-11-18
pubmed:meshHeading	pubmed-meshheading:9419387-Attention, pubmed-meshheading:9419387-Humans, pubmed-meshheading:9419387-Models, Biological, pubmed-meshheading:9419387-Motion, pubmed-meshheading:9419387-Pattern Recognition, Visual
pubmed:year	1998
pubmed:articleTitle	Letter recognition reveals pathways of second-order and third-order motion.
pubmed:affiliation	Computation and Neural Systems, California Institute of Technology, Pasadena, CA 91125, USA. ching@cns.caltech.edu
pubmed:publicationType	Journal Article, Research Support, Non-U.S. Gov't