Journal
JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE
Volume 26, Issue 3, Pages 917-933Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0096-1523.26.3.917
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- NINDS NIH HHS [NS21047] Funding Source: Medline
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Spatial representations in the visual system were probed in 4 experiments involving A. ii., a woman with a developmental deficit in localizing Visual stimuli. Previous research (M. McCloskey et al., 1995) has shown that A. H.'s localization errors take the form of reflections across a central vertical or horizontal axis (e.g., a stimulus 30 degrees to her left localized to a position 30 degrees to her right). The present experiments demonstrate that A. H.'s errors vary systematically as a function of where her attention is focused, independent of how her eyes, head, or body are oriented, or what potential reference points are present in the visual field. These results suggest that the normal visual system constructs attention-referenced spatial representations, in which the focus of attention defines the origin of a spatial coordinate system. A more general implication is that some of the brain's spatial representations take the form of coordinate systems.
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