Accession Number:

AD0768215

Title:

Motion Sickness Incidence as a Function of the Frequency and Acceleration of Vertical Sinusoidal Motion

Descriptive Note:

Technical rept. 1 Jul 1972-30 Jun 1973

Corporate Author:

CANYON RESEARCH GROUP INC GOLETA CA HUMAN FACTORS RESEARCH DIV

Report Date:

1973-09-01

Pagination or Media Count:

22.0

Abstract:

Fourteen experimental conditions of vertical sinusoidal motion were defined by combinations of wave frequency and acceleration level in a partial factorial design. The frequency range investigated was from 5 cycles per minute CPM, or .083 Hz to 30 CPM .500 Hz, and the average acceleration over each half-wave cycle ranged from about .03 to .40 g. Independent groups of 20 or more male Ss were exposed for 2 hours or until they began to vomit, whichever came first. Motion sickness incidence MSI, defined as the percentage of Ss experiencing vomiting, was greatest at a frequency of 10 CPM .167 Hz. For all wave frequencies, MSI increased as a monotonic function of the acceleration level. A mathematical model was derived from the data, and the implications for underlying physiological mechanisms and for transportation vehicle design were discussed.

Subject Categories:

  • Stress Physiology
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE