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Effects of hand proximity and movement direction in spatial and temporal gap discrimination

  • Previous research on the interplay between static manual postures and visual attention revealed enhanced visual selection near the hands (near-hand effect). During active movements there is also superior visual performance when moving toward compared to away from the stimulus (direction effect). The "modulated visual pathways" hypothesis argues that differential involvement of magno- and parvocellular visual processing streams causes the near-hand effect. The key finding supporting this hypothesis is an increase in temporal and a reduction in spatial processing in near-hand space (Gozli et al., 2012). Since this hypothesis has, so far, only been tested with static hand postures, we provide a conceptual replication of Gozli et al.'s (2012) result with moving hands, thus also probing the generality of the direction effect. Participants performed temporal or spatial gap discriminations while their right hand was moving below the display. In contrast to Gozli et al (2012), temporal gap discrimination was superior at intermediate and notPrevious research on the interplay between static manual postures and visual attention revealed enhanced visual selection near the hands (near-hand effect). During active movements there is also superior visual performance when moving toward compared to away from the stimulus (direction effect). The "modulated visual pathways" hypothesis argues that differential involvement of magno- and parvocellular visual processing streams causes the near-hand effect. The key finding supporting this hypothesis is an increase in temporal and a reduction in spatial processing in near-hand space (Gozli et al., 2012). Since this hypothesis has, so far, only been tested with static hand postures, we provide a conceptual replication of Gozli et al.'s (2012) result with moving hands, thus also probing the generality of the direction effect. Participants performed temporal or spatial gap discriminations while their right hand was moving below the display. In contrast to Gozli et al (2012), temporal gap discrimination was superior at intermediate and not near hand proximity. In spatial gap discrimination, a direction effect without hand proximity effect suggests that pragmatic attentional maps overshadowed temporal/spatial processing biases for far/near-hand space.show moreshow less

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Metadaten
Author:Michael Wiemers, Martin H. FischerORCiDGND
URN:urn:nbn:de:kobv:517-opus4-406568
Parent Title (English):Postprints der Universität Potsdam : Humanwissenschaftliche Reihe
Series (Serial Number):Postprints der Universität Potsdam : Humanwissenschaftliche Reihe (428)
Document Type:Postprint
Language:English
Date of first Publication:2018/06/06
Year of Completion:2016
Publishing Institution:Universität Potsdam
Release Date:2018/06/06
Tag:attention; movement preparation; perception and action; two visual systems; visual perception
Issue:428
Pagenumber:10
Source:Frontiers in psychology 7 (2016) Art. 1930, DOI: 10.3389/fpsyg.2016.01930
Organizational units:Humanwissenschaftliche Fakultät
Humanwissenschaftliche Fakultät / Institut für Psychologie
Dewey Decimal Classification:1 Philosophie und Psychologie / 15 Psychologie / 150 Psychologie
Peer Review:Referiert
Publication Way:Open Access
Grantor:Frontiers
Licence (German):License LogoCreative Commons - Namensnennung, 4.0 International