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  Determining whether a ball will land behind or in front of you: Not just a combination of expansion and angular velocity

Brouwer, A.-M., Lopez-Moliner, J., Brenner, E., & Smeets, J. (2006). Determining whether a ball will land behind or in front of you: Not just a combination of expansion and angular velocity. Vision Research, 46(3), 382-391. doi:10.1016/j.visres.2005.09.002.

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Brouwer, A-M1, 2, Author           
Lopez-Moliner, J, Author
Brenner, E, Author           
Smeets, JBJ, 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, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: We propose and evaluate a source of information that ball catchers may use to determine whether a ball will land behind or in front of them. It combines estimates for the ball’s horizontal and vertical speed. These estimates are based respectively on the rate of angular expansion and vertical velocity. Our variable could account for ball catchers’ data of Oudejans et al. (1997), but those data could also be explained by the use of angular expansion alone. We therefore asked subjects where simulated balls would land under conditions in which both angular expansion and vertical velocity must be combined for obtaining a correct response. We found evidence for the use of angular velocity but hardly any indication for the use of angular expansion. Thus if catchers use a strategy that involves combining vertical and horizontal estimates of the ball’s speed, they do not obtain their estimates of the horizontal component from the rate of expansion alone.

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 Dates: 2006-02
 Publication Status: Issued
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 Identifiers: DOI: 10.1016/j.visres.2005.09.002
BibTex Citekey: 3198
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Title: Vision Research
  Other : Vision Res.
Source Genre: Journal
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Publ. Info: Amsterdam : Pergamon
Pages: - Volume / Issue: 46 (3) Sequence Number: - Start / End Page: 382 - 391 Identifier: ISSN: 0042-6989
CoNE: https://pure.mpg.de/cone/journals/resource/954925451842