Comparison of five levels of motion sickness severity as the basis for grading susceptibility.
Earl Fred Miller, Ashton Graybiel · PsycEXTRA Dataset · 1970
a less severe, yet equivalent statistically, to the criteria for grading motion sickness susceptibilityThe motion sickness susceptibility of 275 healthy male subjects was measured u a n t ~t a t ~v e l ~ by a standardized aboratory procedure using a Stille rotational chair.he results, i n terms of velocity f the chair and the number of active head movements, were combined into a single numerical score that represented the total stressor stimulus ined in reaching, in turn, each of five specific criteria for diagnosing the severity of motion sickness; viz, frank sickness (FS), severe malaise (M Ill), modetwte malaise is), and mild malaise (M ).The stressor value (E factor) of a single a t each test rpm was adi ted to yield an equivaikt susceptibility score oriolis Sickness Susceptibility Index, or CSSI) independent of the endpoint selected e ose agreement among the CSSl scores obtained at each endpoint was found in intert-retest reliability coefficients, and frequency distributions, which reliness and stability in the appearance, ramification, and intensification of the acute symptomatology evoked in progressing from M I to FS.The endpoint M IIA appeared, however, to yield the best balance between subject acceptability and test confidence and was used without exception to calibrate the motion sickness susceptibi of 250 additional subjects.