Oculogravic Illusion

“…(2,(5)(6)(7)(8) in a series of studies have explored the effects on visual orientation of changing the direction of force by centrifugation. When seated physically upright at some distance from the axis of a centrifuge or carousel device, as first described by Purkinje (22) and later by Mach (lo), a person w i l l experience upon rotation a sensation of tilting in accord with the gravitoinertial vertical.…”

Section: Introductionmentioning

confidence: 99%

Magnitude of gravitoinertial force, an independent variable in egocentric visual localization of the horizontal.

Miller¹,

Graybiel²

1966

Journal of Experimental Psychology

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The direction of gravitoinertial force (GIF), i.e., the resultant of the gravitational and induced centripetal force vectors, was held constant while the magnitude of force was varied from 1.0-2.0 G to determine its effect upon egocentric visual localization (EVL) of the horizontal. 8 normal and 2 labyrinthine-defective (L-D) men served as Ss. The EVL of the horizontal was found to deviate from the gravitoinertial horizontal as a function of magnitude of the GIF. This magnitude effect tended to increase with the amount of body tilt from its alignment with the resultant force. The increase of GIF in the case of the L-D Ss resulted generally in an apparent rotation of the physical horizontal in a direction of the E then A phenomenon in contrast to the normal Ss who manifested ever increasing amounts of the E phenomenon only. Based upon these findings and the assumption that Ss differed under the experimental conditions primarily in otolithic function, the possible roles of otolithic and nonotolithic gravireceptor cues in visual localization in the absence of empirical visual cues are discussed.

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“…This is extraordinary i n view of the great influence of vision i n the interaction between visual and gravitational cues not only under normal terrestrial conditions (32) but also under conditions of moder ately increased G loadings (9). It suggests that persons i n weightlessness are vulnerable to influences which determine the feeling of up or down based on gravitational cues.…”

Section: Discussionmentioning

confidence: 97%

Orientation in Aerospace Flight.

Graybiel¹

1966

PsycEXTRA Dataset

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Oculogravic Illusion

Cited by 176 publications

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Visual orientation during and after lateral head, body, and trunk tilt

Visual orientation during and after lateral head, body, and trunk tilt

Magnitude of gravitoinertial force, an independent variable in egocentric visual localization of the horizontal.

Orientation in Aerospace Flight.

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