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Visual mental imagery interferes with allocentric orientation judgements.

F Mast1, S M Kosslyn, A Berthoz

  • 1Department of Psychology, Harvard University, Cambridge, MA 02138, USA.

Neuroreport
|January 5, 2000
PubMed
Summary
This summary is machine-generated.

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Visual mental imagery, like actual visual perception, influences our sense of verticality. This study shows that imagining a tilted line can shift your perceived visual vertical, demonstrating top-down processing in spatial orientation.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Perception

Background:

  • The subjective visual vertical (SVV) indicates how individuals perceive vertical orientation.
  • SVV mechanisms are typically attributed to bottom-up processing of vestibular and visual input.
  • The potential role of top-down cognitive processes in SVV perception remains less understood.

Purpose of the Study:

  • To investigate the influence of mental imagery on the perception of the subjective visual vertical.
  • To explore the contribution of top-down processing in spatial orientation tasks.

Main Methods:

  • An interference paradigm was employed to assess the impact of mental images.
  • Participants judged the orientation of a visual indicator as apparently vertical.

Related Experiment Videos

  • The study compared the effects of visual perception versus visual mental imagery.

    • Main Results:

    • Visual mental imagery significantly influenced the subjective visual vertical.
    • The directional effect of mental imagery on SVV was comparable to that of actual visual perception.
    • This provides evidence for top-down modulation of spatial orientation.

    Conclusions:

    • Top-down processes, specifically visual mental imagery, play a crucial role in determining the subjective visual vertical.
    • The findings suggest that the brain integrates imagined visual information similarly to perceived visual information for spatial orientation.