Predicting individual acclimation to the cross-coupled illusion for artificial gravity.

Area of Science:

• Vestibular science
• Human factors engineering
• Artificial gravity research

Background:

• The cross-coupled (CC) illusion and motion sickness impede artificial gravity via centrifugation.
• Human acclimation to the CC illusion varies significantly between individuals, with poor understanding of underlying factors.

Purpose of the Study:

• To identify predictors of individual acclimation rates to the CC illusion.
• To understand inter-individual differences in adapting to centrifugation-induced illusions.

Main Methods:

• Eleven subjects underwent up to 50 acclimation sessions to the CC illusion.
• Acclimation rate was determined by the spin rate increase slope.
• Vestibular perceptual thresholds (yaw, pitch, roll) and demographics were assessed.

Main Results:

• A significant negative correlation was found between acclimation rate and roll threshold (p=0.025).
• Lower roll thresholds correlated with faster acclimation to the CC illusion.
• Roll thresholds were predictive of acclimation rates via cross-validation.

Conclusions:

• Vestibular roll thresholds can predict individual CC illusion acclimation rates.
• Predicting acclimation is key for optimizing training and enhancing artificial gravity feasibility.
• This research supports the development of fast-rotation, short-radius centrifugation systems.