@article{ref1,
title="Visually perceived eye level: changes induced by a pitched-from-vertical 2-line visual field",
journal="Journal of experimental psychology: human perception and performance",
year="1992",
author="Matin, L. and Li, W. X.",
volume="18",
number="1",
pages="257-289",
abstract="The physical elevation corresponding to visually perceived eye level (VPEL) changes linearly with the pitch of a visual field. Deviations from true eye level average more than 0.5 times the angle of pitch over a 65 degrees pitch range. A visual field consisting of 2 dim, isolated vertical lines in darkness is more than 4/5 as effective as that of a complexly structured visual field; 2 horizontal lines have a small and inconsistent effect. Differences in influence on VPEL between pitched-from-vertical and horizontal lines were predicted from an analysis that extracted differences in retinal perspective resulting from changes in pitch. The Great Circle Model (GCM), based on a spherical approximation to the erect, stationary eye, predicts the present results and results of 8 other sets of experiments. The model treats the influence of a single line on VPEL as systematically related to the elevation of the intersection between the great circle containing the image of the line and the central vertical retinal meridian; generalized GCM combines visual inputs with inputs from the body-referenced mechanism and maps onto the central nervous system.<p /> <p>Language: en</p>",
language="en",
issn="0096-1523",
doi="",
url="http://dx.doi.org/"
}