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Self-motion magnitude estimation during linear oscillation - Changes with head orientation and following fatigueTwo types of experiments concerning the estimated magnitude of self-motion during exposure to linear oscillation on a parallel swing are described in this paper. Experiment I examined changes in magnitude estimation as a function of variation of the subject's head orientation, and Experiments II a, II b, and II c assessed changes in magnitude estimation performance following exposure to sustained, 'intense' linear oscillation (fatigue-inducting stimulation). The subjects' performance was summarized employing Stevens' power law R = k x S to the nth, where R is perceived self-motion magnitude, k is a constant, S is amplitude of linear oscillation, and n is an exponent). The results of Experiment I indicated that the exponents, n, for the magnitude estimation functions varied with head orientation and were greatest when the head was oriented 135 deg off the vertical. In Experiments II a-c, the magnitude estimation function exponents were increased following fatigue. Both types of experiments suggest ways in which the vestibular system's contribution to a spatial orientation perceptual system may vary. This variability may be a contributing factor to the development of pilot/astronaut disorientation and may also be implicated in the occurrence of motion sickness.
Document ID
19800027459
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Parker, D. E.
(Miami Univ. Oxford, OH, United States)
Wood, D. L.
(Miami Univ. Oxford, OH, United States)
Gulledge, W. L.
(Miami Univ. Oxford, OH, United States)
Goodrich, R. L.
(Miami University Oxford, Ohio; Harvard University, Cambridge, Mass., United States)
Date Acquired
August 10, 2013
Publication Date
November 1, 1979
Subject Category
Behavioral Sciences
Accession Number
80A11629
Funding Number(s)
CONTRACT_GRANT: NAS9-14538
CONTRACT_GRANT: F615-75-C-5029
Distribution Limits
Public
Copyright
Other

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