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  Do we use different gaze strategies to discriminate extremely similar faces?

Bülthoff, I., & Zhao, M. (2019). Do we use different gaze strategies to discriminate extremely similar faces?. Poster presented at 42nd European Conference on Visual Perception (ECVP 2019), Leuven, Belgium. doi:10.1177/0301006619863862.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-3F73-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-B98B-F
Genre: Poster

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 Creators:
Bülthoff, I1, 2, Author              
Zhao, M1, 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: When two faces are displayed next to each other under similar viewing conditions, we can easily judge whether they represent the same person or not. However, little is known about how well our visual system can differentiate between two faces with increasing levels of similarity. Even less is known about whether differentiating between similar or different faces induces different gaze patterns. To measure the limits of face discrimination ability, we used pairs of morphed faces that were created with an equal number of ‘parent’ faces but never shared any parent faces. To manipulate similarity, we increased the number of parents; the larger the number of parents the more similar the test faces were. Participants remained over guessing rate even when test faces were created out of 32 parents faces each, demonstrating remarkable face discrimination ability. To investigate whether the increased similarity between test faces affects how we compare them, participants’ eye movements were tracked during the discrimination task. Increased face similarity elicits more gaze fixations overall. However, the gaze distribution pattern remained the same whether participants saw two highly similar or dissimilar faces. These results demonstrate that we use stable gaze strategies for discriminating two faces regardless of task difficulty.

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 Dates: 2019-082019-09
 Publication Status: Published in print
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 Identifiers: DOI: 10.1177/0301006619863862
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Title: 42nd European Conference on Visual Perception (ECVP 2019)
Place of Event: Leuven, Belgium
Start-/End Date: 2019-08-25 - 2019-08-29

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Title: Perception
Source Genre: Journal
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Publ. Info: London : Pion Ltd.
Pages: - Volume / Issue: 48 (Supplement 2) Sequence Number: - Start / End Page: 115 - 116 Identifier: ISSN: 0301-0066
CoNE: https://pure.mpg.de/cone/journals/resource/954925509369