Title:  Increasing Accuracy in the Assessment of Motion Sickness: A Construct Methodology
Authors:  C. Stout, and P.S. Cowings
Reference:  NASA Technical Memorandum #108797, Ames Research Center, December 1993

The purpose of this paper is to introduce a new methodology that should improve the accuracy of the assessment of motion sickness. This construct methodology utilizes both subjective reports of motion sickness and objective measures of physiological correlates to assess motion sickness. Current techniques and methods used in the framework of a construct methodology are inadequate, (i.e., using either subjective or objective indicators alone is inadequate). This paper reviews current assessment techniques for diagnosing motion sickness and space motion sickness and calls attention to the problems with current methods. Further, we describe in detail principles of psychophysiology that, when applied, will probably resolve some of these problems.