 Motion sickness is measured based on the cumulative ratings of all these symptoms without distinguishing different levels for each effect.A Motion Sickness Assessment Questionnaire has been developed to test the multiple dimensions of motion sickness more thoroughly; this survey defines motion sickness as gastrointestinal (involving nausea), peripheral (referring to thermoregulatory effects such as clamminess and sweating), central (involving symptoms such as dizziness and lightheadedness), and sopite-related.This questionnaire may more accurately determine how subjects experience sopite symptoms relative to other motion sickness effects.