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Unidirectional Influence of Vision on Locomotion in Multimodal Spatial Representations Acquired from Navigation
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- Author(s) / Creator(s)
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Visual and idiothetic information are coupled in forming multimodal spatial
representations during navigation (Tcheang, Bülthoff, & Burgess, 2011). We investigated
whether idiothetic representations activate visual representations but not vice versa
(unidirectional coupling) or whether these two representations activate each other (bidirectional
coupling). In a virtual reality environment, participants actively rotated in place to face certain
orientations to become adapted to a new vision-locomotion relationship (gain). In particular, the
visual turning angle was equal to 0.7 times the physical turning angle. After adaptation,
participants walked a path with a turn in darkness (idiothetic input only) or watched a video of
the traversed path (visual input only). Then the participants pointed to the origin of the path. The
participants who were presented with only idiothetic input showed that their pointing responses
were influenced by the new gain (adaptation effect). By contrast, the participants who were
presented with only visual input did not show any adaptation effect. These results suggest that
idiothetic input contributed to spatial representations indirectly via the coupling, which resulted
in the adaptation effect, whereas vision alone contributed to spatial representations directly,
which did not result in the adaptation effect. Hence, the coupling between vision and locomotion
is unidirectional. -
- Date created
- 2019-05-06
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- Subjects / Keywords
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- Type of Item
- Article (Published)