ASSESSMENT OF SEMICIRCULAR CANAL FUNCTION: II. INDIVIDUAL DIFFERENCES IN SUBJECTIVE ANGULAR DISPLACEMENT PRODUCED BY TRIANGULAR WAVEFORMS OF ANGULAR VELOCITY.
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Mean estimates N 26 of short arcs of passive whole-body rotation about an Earth-vertical axis were accurate when subjects used a psychophysical procedure that involved counterdisplacement of a pointer on a dial. The required retrospective displacement judgments yielded more accurate mean estimates of angular displacement than were obtained in an earlier experiment which probably involved concurrent velocity matching. The differences in response curves in the various conditions of the two experiments clearly illustrate the importance of attention to psychophysical procedures prior to attempting to develop models of the vestibular endorgans to explain results. The method used in this experiment is sufficient to detect prominent individual differences within a sample of aviation training candidates, and the results obtained thus far indicate high test-retest reliability r12 .94. Author
- Anatomy and Physiology