Effect of Vestibular Perceptual Learning on Vestibular Thresholds and Balance

Inclusion Criteria: * Must be able to stand * No leg or foot amputations * No lower limb braces * Not currently feeling dizzy/lightheaded * Not currently pregnant by self-report * Weight \<= 275 pounds Exclusion Criteria: * Severe head trauma or traumatic brain injury * Any vestibular disorder (e.g., Meniere's Disease, Vestibular Migraine, Unresolved benign paroxysmal positional vertigo (BPPV), Vestibular hypofunction, except that due to aging, PPPD) as assessed by a Vestibular OtoNeurologist and Neurotologist using clinical diagnostic tests described in proposal plus any additional clinical evaluations they identify * History of seizures * Neurologic illness or condition determined by an Otoneurologist known to impact vestibular or balance function(e.g., stroke, neurodegenerative disorders, demyelinating illness) * Major psychiatric (e.g., panic disorder, psychosis, etc.) disorder * Any of the following eye diseases or conditions: amblyopia (or "lazy eye") or history of amblyopia, diagnosis of age-related macular degeneration, retina dystrophy, glaucoma, cataracts, or any other eye condition that limits vision to worse than 20/40 * Recent (\<6 months) orthopedic injuries of the lower extremities (e.g., plantar fasciitis, ankle, knee or hip injury, back strain/herniated disc, …). * Upper extremity injuries requiring current sling immobilization * Recent surgery * Any other severe health problem (heart disease, pulmonary disease, cancer, etc.). * Vision in both eyes must be better than 20/40 with best correction * Due to the potential for nausea with some of the motion stimuli, and to protect fetus and mother, pregnant women will also be excluded from this study * Since every possible exclusionary factor cannot be predicted, additional exclusion criteria may be required