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Perception of rotation, path, and heading in circular trajectories

Content Provider	Springer Nature Link
Author	oij, Suzanne A. E. Nesti, Alessandro Bülthoff, Heinrich H. Pretto, Paolo
Copyright Year	2016
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.
Starting Page	2323
Ending Page	2337
Page Count	15
File Format	PDF
ISSN	00144819
Journal	Experimental Brain Research
Volume Number	234
Issue Number	8
e-ISSN	14321106
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-04-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Motion perception Heading Eccentric rotation Translation Psychophysics Vestibular Multisensory integration Neurosciences Neurology
Content Type	Text
Resource Type	Article
Subject	Neuroscience

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