Adaptation in distance perception with head-movement parallax serving as the veridical cue |
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Authors: | Hans Wallach Ann O’leary |
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Affiliation: | 1. Swarthmore College, 19081, Swarthmore, Pennsylvania 2. University of Pennsylvania, 19174, Philadelphia, Pennsylvania
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Abstract: | When head-movement parallax functioned as the sole veridical distance cue during exposure to spectacles that altered the eyes’ oculomotor adjustments, sizable adaptation was obtained. This result showed that a discrimination of the distances of 60 and 30 cm can be based on head-movement parallax. Using adaptation in demonstrating that head-movement parallax can serve as a distance cue circumvents the problem that the presence of accommodation normally presents when such a demonstration is attempted. The usual contamination of head-movement parallax with accommodation is avoided, because accommodation is altered by the spectacles and does pot function as a veridical cue along with head-movement parallax. |
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