title: Perceived gravitoinertial force during vection.
abstract: BACKGROUND
  When we ride on a roller coaster, our experience of self-motion is accompanied by salient changes in gravitoinertial force. Here we examined whether a similar relationship exists between visually induced self-motion (vection) and perceived gravitoinertial force.
  
  
  METHODS
  There were 15 stationary subjects, each wearing a weight jacket, who were exposed to visual displays simulating upward, backward, or no self-motion. At the end of each 30-s display exposure, subjects: 1) rated the strength of their vection experience; and 2) had the experimenter add/remove weights from their weight jackets to recreate their perceived weight during exposure to the stimulus display.
  
  
  RESULTS
  We found that upward vection increased and downward vection decreased perceived weight. Importantly, the size of these perceived weight changes depended on the strength of the vection experience.
  
  
  CONCLUSIONS
  We conclude that the observed strong relationship between vection and perceived weight stems from the brain's attempt to reconcile the inputs from the different self-motion senses. The current findings have important implications for all simulated self-motions either in virtual reality or in vehicle simulators (particularly fixed-base flight and driving simulators).
authors.affiliation: Faculty of Design and Institute for Advanced Study, Kyushu University, Fukuoka, Japan. seno@design.kyushu-u.ac.jp
authors.forename: Takeharu
authors.initials: T
authors.lastname: Seno
authors.forename: Stephen
authors.initials: S
authors.lastname: Palmisano
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ito
authors.forename: Shoji
authors.initials: S
authors.lastname: Sunaga
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001835:Body Weight / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009949:Orientation / Q000502:physiology*; D010775:Photic Stimulation; D004856:Postural Balance / Q000502:physiology; D055815:Young Adult