How long is your arm? Using multisensory illusions to modify body image from the third person perspective

Catherine Preston, Roger Newport

Research output: Contribution to journalArticlepeer-review


Updating body representations from the 3rd person perspectives (3PP) seems to require viewing the real body, unlike when viewing from a 1st person perspective. Here, 3PP updating was investigated through induction of a physically impossible multisensory illusion in which participants viewed real-time 3PP video of themselves having their arm pulled until it stretched to twice its normal length. The illusion elicited the subjective experience that the participant's own arm had been stretched and caused an overestimation of reaching distance, although actual reaches were unaffected. Multisensory illusions from the 3PP can alter body image when applied to real bodies.

Original languageEnglish
Pages (from-to)247-249
Number of pages3
Issue number2
Publication statusPublished - 2012


  • Arm
  • Body Image
  • Humans
  • Illusions
  • Orientation
  • Pattern Recognition, Visual
  • Perceptual Distortion
  • Psychomotor Performance
  • Size Perception
  • Touch
  • User-Computer Interface
  • Video Recording

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