Absolute And Differential Thresholds Of Motion Effects In Cardinal Directions
summary
Measures absolute and differential vestibular thresholds for all six DOFs using a motion platform with sinusoidal stimuli (one cycle for absolutes, two cycles with appended half cycles for differentials), restricting nonvestibular cues. Absolute thresholds defined at 0.5 detection with method of constant stimuli (7 participants), differential thresholds via two‑up one‑down (approx. 0.3) with adaptive staircases (10 participants) yielding 18 measurements and Weber fractions. Z‑axis (heave/up‑down) shows the highest thresholds, and there is a strong linear relation for roll, yaw, surge but weaker relations for the other motions.
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