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  Perception of rotation, path, and heading in circular trajectories

Nooij, S., Nesti, A., Bülthoff, H., & Pretto, P. (2016). Perception of rotation, path, and heading in circular trajectories. Experimental Brain Research, 234(8), 2323-2337. doi:10.1007/s00221-016-4638-0.

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Nooij, SAE1, 2, 3, Author           
Nesti, A1, Author           
Bülthoff, HH1, 2, 4, Author           
Pretto, P1, 2, 3, Author           
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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              
3Project group: Motion Perception & Simulation, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528705              
4Project group: Cybernetics Approach to Perception & Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528701              

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 Abstract: When in darkness, humans can perceive the direction and magnitude of rotations and of linear translations in the horizontal plane. The current paper addresses the integrated perception of combined translational and rotational motion, as it occurs when moving along a curved trajectory. We questioned whether the perceived motion through the environment follows the predictions of a self-motion perception model (e.g., Merfeld et al. in J Vestib Res 3:141–161, 1993; Newman in A multisensory observer model for human spatial orientation perception, 2009), which assume linear addition of rotational and translational components. For curved motion in darkness, such models predict a non-veridical motion percept, consisting of an underestimation of the perceived rotation, a distortion of the perceived travelled path, and a bias in the perceived heading (i.e., the perceived instantaneous direction of motion with respect to the body). These model predictions were evaluated in two experiments. In Experiment 1, seven participants were moved along a circular trajectory in darkness while facing the motion direction. They indicated perceived yaw rotation using an online tracking task, and perceived travelled path by drawings. In Experiment 2, the heading was systematically varied, and six participants indicated, in a 2-alternative forced-choice task, whether they perceived facing inward or outward of the circular path. Overall, we found no evidence for the heading bias predicted by the model. This suggests that the sum of the perceived rotational and translational components alone cannot adequately explain the overall perceived motion through the environment. Possibly, knowledge about motion dynamics and familiar stimuli combinations may play an important additional role in shaping the percept.

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 Dates: 2016-08
 Publication Status: Issued
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 Identifiers: DOI: 10.1007/s00221-016-4638-0
BibTex Citekey: NooijNBP2016
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Title: Experimental Brain Research
Source Genre: Journal
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Pages: - Volume / Issue: 234 (8) Sequence Number: - Start / End Page: 2323 - 2337 Identifier: -