--- abstract: |- A veridical percept of ego-motion is normally derived from a combination of visual, vestibular, and proprioceptive signals. In a previous study, blindfolded subjects could accurately perceive passively travelled straight or curved trajectories provided that the orientation of the head remained constant along the trajectory. When they were turned (whole-body, head-fixed) relative to the trajectory, errors occurred. We ask here whether vision allows for better path perception in similar tasks, to correct or complement vestibular perception. Seated, stationary subjects wore a head mounted display showing optic flow stimuli which simulated linear or curvilinear 2D trajectories over a horizontal ground plane. The observer's orientation was either fixed in space, fixed relative to the path, or changed relative to both. After presentation, subjects reproduced the perceived movement with a model vehicle, of which position and orientation were recorded. They tended to correctly perceive ego-rotation (yaw), but they perceived orientation as fixed relative to trajectory or (unlike in the vestibular study) to space. This caused trajectory misperception when body rotation was wrongly attributed to a rotation of the path. Visual perception was very similar to vestibular perception. altloc: [] chapter: ~ commentary: ~ commref: ~ confdates: ~ conference: ~ confloc: ~ contact_email: ~ creators_id: [] creators_name: - family: Bertin given: R.J.V. honourific: '' lineage: '' - family: Israël given: I. honourific: '' lineage: '' - family: Lappe given: M. honourific: '' lineage: '' date: 2000 date_type: published datestamp: 2002-03-07 department: ~ dir: disk0/00/00/21/20 edit_lock_since: ~ edit_lock_until: ~ edit_lock_user: ~ editors_id: [] editors_name: [] eprint_status: archive eprintid: 2120 fileinfo: /style/images/fileicons/application_pdf.png;/2120/2/VR%2D2000%2D40%2D21%2DP2951%2DRE.PDF full_text_status: public importid: ~ institution: ~ isbn: ~ ispublished: pub issn: ~ item_issues_comment: [] item_issues_count: 0 item_issues_description: [] item_issues_id: [] item_issues_reported_by: [] item_issues_resolved_by: [] item_issues_status: [] item_issues_timestamp: [] item_issues_type: [] keywords: 'path perception, ego-motion; optic flow; linear heading, circular heading, vision; vestibular.' lastmod: 2011-03-11 08:54:54 latitude: ~ longitude: ~ metadata_visibility: show note: ~ number: 21 pagerange: 2951-2971 pubdom: FALSE publication: Vision Research publisher: ~ refereed: TRUE referencetext: |- Banks, M.S., Ehrlich, S.M., Backus, B.T., & Crowell, J.A. 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