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Conference Paper: Collinear contour integration impairs visual search before binocular fusion

TitleCollinear contour integration impairs visual search before binocular fusion
Authors
KeywordsMedical sciences
Ophthalmology and optometry
Issue Date2013
PublisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/
Citation
The 13th Annual Meeting of the Vision Science Society (VSS 2013), Naples, FL., 10-15 May 2013. In Journal of Vision, 2013, v. 13 n. 9, article 1245 How to Cite?
AbstractPerceptual grouping plays an indispensable role on figure/ground segregation and attention distribution. However, its relation with visual attention is not well understood yet. Jingling & Tseng (2012) reported that visual search was harder when the target overlapped with a global distractor constituted by collinear elements but not by non-collinear elements. The present study aims at investigating how early this collinear grouping affects selective search in visual pathway. Our observers viewed a 9x9 search display containing identical vertical (or horizontal) bars except a randomly selected distractor column consisting of orthogonal bars. This distractor was grouped into a collinear (snake-like) or non-collinear (ladder-like) organization. Participants judged orientation of a target located either on the distractor column or the other columns. In Experiment 1, we varied the distractor length (= 1, 5, or 9 bars) and found search impairment occurred only at the visual display when the collinear distractor reached a critical length (= 5 bars), not under or when distractor is non-collinear. In Experiment 2, we used a stereoscope to split the distractor column into two eyes: one eye saw a distractor column with varied length (distractor_length_mono = 1, 5, or 9 bars) while the other eye saw the rest parts of the distractor. When both eyes were properly fused, observers saw a search display identical to Experiment 1 with the longest distractor length (distractor_length_bino = 9 bars). If collinear contour affected visual search after binocular fusion, the search impairment effect should be observable in all three conditions. However, we found that observers’ RTs were identical to that in Experiment 1, suggesting monocular collinear contour information dictated selective attention. Our results imply that the effect of collinear grouping on attention is likely to be driven by bottom-up processes.
DescriptionMeeting abstract presented at VSS 2013
Open Access Journal
Session - Visual search: Attention
Persistent Identifierhttp://hdl.handle.net/10722/190226
ISSN
2015 Impact Factor: 2.341
2015 SCImago Journal Rankings: 1.042

 

DC FieldValueLanguage
dc.contributor.authorChow, HMen_US
dc.contributor.authorTseng, Cen_US
dc.date.accessioned2013-09-17T15:15:53Z-
dc.date.available2013-09-17T15:15:53Z-
dc.date.issued2013en_US
dc.identifier.citationThe 13th Annual Meeting of the Vision Science Society (VSS 2013), Naples, FL., 10-15 May 2013. In Journal of Vision, 2013, v. 13 n. 9, article 1245en_US
dc.identifier.issn1534-7362-
dc.identifier.urihttp://hdl.handle.net/10722/190226-
dc.descriptionMeeting abstract presented at VSS 2013-
dc.descriptionOpen Access Journal-
dc.descriptionSession - Visual search: Attention-
dc.description.abstractPerceptual grouping plays an indispensable role on figure/ground segregation and attention distribution. However, its relation with visual attention is not well understood yet. Jingling & Tseng (2012) reported that visual search was harder when the target overlapped with a global distractor constituted by collinear elements but not by non-collinear elements. The present study aims at investigating how early this collinear grouping affects selective search in visual pathway. Our observers viewed a 9x9 search display containing identical vertical (or horizontal) bars except a randomly selected distractor column consisting of orthogonal bars. This distractor was grouped into a collinear (snake-like) or non-collinear (ladder-like) organization. Participants judged orientation of a target located either on the distractor column or the other columns. In Experiment 1, we varied the distractor length (= 1, 5, or 9 bars) and found search impairment occurred only at the visual display when the collinear distractor reached a critical length (= 5 bars), not under or when distractor is non-collinear. In Experiment 2, we used a stereoscope to split the distractor column into two eyes: one eye saw a distractor column with varied length (distractor_length_mono = 1, 5, or 9 bars) while the other eye saw the rest parts of the distractor. When both eyes were properly fused, observers saw a search display identical to Experiment 1 with the longest distractor length (distractor_length_bino = 9 bars). If collinear contour affected visual search after binocular fusion, the search impairment effect should be observable in all three conditions. However, we found that observers’ RTs were identical to that in Experiment 1, suggesting monocular collinear contour information dictated selective attention. Our results imply that the effect of collinear grouping on attention is likely to be driven by bottom-up processes.-
dc.languageengen_US
dc.publisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/-
dc.relation.ispartofJournal of Visionen_US
dc.subjectMedical sciences-
dc.subjectOphthalmology and optometry-
dc.titleCollinear contour integration impairs visual search before binocular fusionen_US
dc.typeConference_Paperen_US
dc.identifier.emailTseng, C: tseng@hku.hken_US
dc.identifier.authorityTseng, C=rp00640en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1167/13.9.1245-
dc.identifier.hkuros222330en_US
dc.identifier.volume13en_US
dc.identifier.issue9-
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 131029-

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