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  Spatial partitioning during visual search of a dyad

Chatziastros, A., & Bülthoff, H. (2006). Spatial partitioning during visual search of a dyad. Poster presented at 6th Annual Meeting of the Vision Sciences Society (VSS 2006), Sarasota, FL, USA.

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Chatziastros, A1, 2, Author              
Bülthoff, HH1, 2, Author              
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1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: It has been shown recently that people can use visual feedback about the current gaze direction of a second searcher to effectively partition the search space (Zelinsky et al., VSS abstract 2005, p. 193). We investigated whether a partitioning of space during dual visual search can occur without explicit feedback and verbal communication. Pairs of participants were seated side-by-side and searched for a target letter (“T”) among a set of distractor letters (“L”), projected on a large projection screen (2.20 x 1.80 m), indicating target present or absent on their individual keyboard. The instructions were varied: In experiment 1 (N=20) neither collaboration nor competition was emphasized (neutral instruction condition, NIC). In experiment 2, participants (N=22) were instructed to collaborate in order to obtain an announced gratification for the best group performance (collaborative instruction condition, CIC). In both experiments participants wore hearing protections and communication was prohibited. In NIC, participants responded fastest when the target appeared at the opposite side of the screen's center. In CIC, however, reaction times were faster when target letters were presented on the same side of the participant, resulting in a linear relationship between horizontal target eccentricity and the prevalence of the faster response at a particular seating side. We conclude that attention became spatially biased in horizontal direction during dual visual search, as a result of the physical juxtaposition of the participants. These findings can be interpreted as evidence for an implicit spatial partitioning of search space which can occur even without explicit feedback and verbal communication.

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 Dates: 2006-06
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1167/6.6.521
BibTex Citekey: 4176
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Title: 6th Annual Meeting of the Vision Sciences Society (VSS 2006)
Place of Event: Sarasota, FL, USA
Start-/End Date: 2006-05-05 - 2006-05-10

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Title: Journal of Vision
Source Genre: Journal
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Publ. Info: Charlottesville, VA : Scholar One, Inc.
Pages: - Volume / Issue: 6 (6) Sequence Number: - Start / End Page: 521 Identifier: ISSN: 1534-7362
CoNE: https://pure.mpg.de/cone/journals/resource/111061245811050