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Area of Science:

  • Human Factors
  • Cognitive Psychology
  • Aerospace Medicine

Background:

  • Motion stimuli are known to negatively affect cognitive performance.
  • The specific mechanisms, including spatial disorientation (SD) and stimulus magnitude, require further investigation.

Purpose of the Study:

  • To investigate the relationship between motion stimuli, Type-II spatial disorientation (SD), and cognitive performance.
  • To determine if the magnitude of motion stimuli or an interaction with SD influences cognitive function.

Main Methods:

  • Participants (n=23) experienced controlled yaw rotations in a darkened room.
  • A 'surprise' condition induced a perceived rotation opposite to the actual motion, while a 'no-surprise' condition aligned perceived and actual motion.
  • Cognitive performance was assessed via a self-paced arithmetic task after motion stimuli cessation.

Main Results:

  • Surprise significantly decreased counting speed with a large effect size.
  • Counting errors increased significantly under surprise conditions, particularly with high-magnitude motion stimuli.

Conclusions:

  • Surprise recognition of spatial disorientation (SD) involuntarily disrupts cognition.
  • Findings are crucial for modeling motion effects on performance and developing pilot SD awareness training.