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Visual scene effects on the somatogravic illusion.

F H Previc1, D C Varner, K K Gillingham

  • 1Flight Motion Effects Branch, Armstrong Laboratory, Brooks AFB, TX 78235-5000.

Aviation, Space, and Environmental Medicine
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

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Visual scene cues did not significantly reduce the somatogravic illusion (SGI), a spatial disorientation. This suggests current head-mounted displays may not reliably overcome this illusion during linear acceleration.

Area of Science:

  • Human Factors
  • Aerospace Medicine
  • Perception Psychology

Background:

  • The somatogravic illusion (SGI) causes spatial disorientation by misinterpreting gravitoinertial forces during linear acceleration as changes in pitch or bank attitude.
  • Understanding visual cues that counteract SGI is crucial for aviation safety and virtual reality immersion.

Purpose of the Study:

  • To evaluate the effectiveness of various visual scene cues in mitigating the somatogravic illusion (SGI).
  • To determine if computer-generated visual scenes presented via head-mounted displays can reduce SGI magnitude.

Main Methods:

  • Nine subjects experienced a -30 degree pitch gravitoinertial force shift.
  • Visual scenes (horizon, texture, perspective, color) were presented via head-mounted display, both individually and combined.

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  • Performance was compared between eyes-closed (baseline) and visual display conditions.

    • Main Results:

    • No visual scene cue significantly reduced the SGI magnitude compared to the eyes-closed condition.
    • Textured visual scenes induced some linear vection, but did not diminish the SGI.
    • The effectiveness of current head-mounted displays in overcoming SGI remains unproven.

    Conclusions:

    • Computer-generated visual scenes, including those with horizon and texture, were ineffective in significantly reducing the somatogravic illusion.
    • Further research is needed to establish if advanced head-mounted displays can reliably mitigate SGI and similar spatial disorientation phenomena.