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• W3157240156 startingPage "9" @default.
• W3157240156 abstract "Obtaining reliable estimates of the time-to-contact (TTC) in a three-dimensional (3D) parabolic trajectory is still an open issue. A direct analysis of the optic flow cannot make accurate predictions for gravitationally accelerated objects. Alternatively, resorting to prior knowledge of gravity and size can provide accurate estimates of TTC in parabolic head-on trajectories, but its generalization depends on the specific geometry of the trajectory and particular moments. The aim of this work is to explore the preferred viewing windows to estimate TTC and how the available visual information affects these estimations. We designed a task in which participants, wearing an head-mounted display (HMD), had to time the moment a ball in a parabolic path returned at eye level. We used five trajectories for which accurate temporal predictions were available at different points of flight time. Our results show that our observers can predict both the trajectory of the ball and TTC based on the available visual information and previous experience with the task. However, the times at which our observers chose to gather the visual evidence did not match those in which visual information provided accurate TTC. Instead, they looked at the ball at relatively fixed temporal windows depending on the trajectory but not of TTC." @default.
• W3157240156 created "2021-05-10" @default.
• W3157240156 creator A5011881550 @default.
• W3157240156 creator A5069075357 @default.
• W3157240156 date "2021-04-26" @default.
• W3157240156 modified "2023-09-23" @default.
• W3157240156 title "Flexible viewing time when estimating time-to-contact in 3D parabolic trajectories" @default.
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• W3157240156 doi "https://doi.org/10.1167/jov.21.4.9" @default.
• W3157240156 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8088230" @default.
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• W3157240156 hasPublicationYear "2021" @default.
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