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  Influence of eccentricity on action recognition

Fademrecht, L., Bülthoff, I., & de la Rosa, S. (2014). Influence of eccentricity on action recognition. Poster presented at 14th Annual Meeting of the Vision Sciences Society (VSS 2014), St. Pete Beach, FL, USA.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-3274-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-AAB4-F
Genre: Poster

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Fademrecht, L1, 2, Author              
Bülthoff, I1, 2, Author              
de la Rosa, S1, 2, Author              
Affiliations:
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: The recognition of actions is critical for human social functioning and provides insight into both the active and the inner states (e.g. valence) of another person. Although actions often appear in the visual periphery little is known about action recognition beyond foveal vision. Related previous research showed that object recognition and object valence (i.e. positive or negative valence) judgments are relatively unaffected by presentations up to 13° visual angle (VA) (Calvo et al. 2010). This is somewhat surprising given that recognition performance of words and letters sharply decline in the visual periphery. Here participants recognized an action and evaluated its valence as a function of eccentricity. We used a large screen display that allowed presentation of stimuli over a visual field from -60 to +60° VA. A life-size stick figure avatar carried out one of six motion captured actions (3 positive actions: handshake, hugging, waving; 3 negative actions: slapping, punching and kicking). 15 participants assessed the valence of the action (positive or negative action) and another 15 participants identified the action (as fast and as accurately as possible). We found that reaction times increased with eccentricity to a similar degree for the valence and the recognition task. In contrast, accuracy performance declined significantly with eccentricity for both tasks but declined more sharply for the action recognition task. These declines were observed for eccentricities larger than 15° VA. Thus, we replicate the findings of Calvo et al. (2010) that recognition is little affected by extra-foveal presentations smaller than 15° VA. Yet, we additionally demonstrate that visual recognition performance of actions declined significantly at larger eccentricities. We conclude that large eccentricities are required to assess the effect of peripheral presentation on visual recognition.

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 Dates: 2014-08
 Publication Status: Published in print
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 Identifiers: DOI: 10.1167/14.10.1006
BibTex Citekey: FademrechtBd2014
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Title: 14th Annual Meeting of the Vision Sciences Society (VSS 2014)
Place of Event: St. Pete Beach, FL, USA
Start-/End Date: 2014-05-16 - 2014-05-21

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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: 14 (10) Sequence Number: - Start / End Page: 1006 Identifier: ISSN: 1534-7362
CoNE: https://pure.mpg.de/cone/journals/resource/111061245811050