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Whereas subject-relative information holds its relation to the body regardless of its orientation in space, it has been shown that the egocentric judgment is disturbed when the orientation of the Z axis is no more parallel to the direction of gravity. The influence of gravity on the egocentric perception of space has been inferred from interactions...
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... the pre-set tilt, subjects were asked (1) to verbally indicate, eyes closed, the subjective body orientation using a clock scale and (2) to adjust a luminous line to the vertical under two conditions. In the strapped condition, subjects were restrained by means of straps; In the body cast condition subjects were completely immobilized by means of the body-cast (Figure 1). Data analyses were carried out on the angular difference (in degrees) between (1) the estimated body ENACTIVE/07 orientation and chair tilt (positive for the overestimation, negative for the underestimation), (2) the rod adjustment and the upright (positive for Aubert effect). ...
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