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Neuropsychologia. 1997 Apr;35(4):445-56.

Object-centered neglect for letters: do informational asymmetries play a role?

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Department of Psychology, University of Michigan, Ann Arbor 48109-1109, USA.


In a study of right-parietal patients, Behrmann and Moscovitch [Journal of Cognitive Neuroscience, Vol. 6, pp.1-16, 1994] found object-centered left neglect for asymmetrical but not symmetrical letters, leading them to attribute this neglect to the objects' canonical handedness or intrinsic asymmetry. Using a similar task, we find the same results in neurologically intact observers. However, right-sided bias was observed only when the letters were identified. Because asymmetrical letters are distinguished by features on their right sides, we propose that the apparent object-centered bias in normals and in right-parietal patients may arise from attending to identifying features rather than from representational differences between symmetrical and asymmetrical letters.

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