Interactive perceptual and attentional limits in visual extinction

Lilach Shalev, Eran Chajut, Glyn W. Humphreys

Research output: Contribution to journalArticlepeer-review

Abstract

We report a case-study of YE, a 54-year-old person who suffered multiple shell injuries that caused a right-parietal lesion and left hemianopia, almost 30 years ago. We conducted 4 experiments using a basic extinction paradigm in which YE had to report single stimuli presented on the left or right or two stimuli presented simultaneously in both visual fields. We show that extinction was selectively affected both by increasing the relative perceptual salience of the contralesional stimulus and by cueing attention to the contralesional side. The effects of perceptual salience and attentional cueing interacted, with cueing being more effective when the stimuli had relatively high perceptual salience. The data are consistent with attentional and perceptual factors interacting to determine the competition between left and right side stimuli that underlies extinction.

Original languageEnglish
Pages (from-to)452-462
Number of pages11
JournalNeurocase
Volume11
Issue number6
DOIs
StatePublished - Dec 2005

Bibliographical note

Funding Information:
Received 24 September 2003; accepted 21 September 2005 We thank YE for his cooperation and exciting insights throughout the study. This paper was supported by grants from the BBSRC, the MRC and the Stroke Association. Address correspondence to Lilach Shalev, Department of Education and Psychology, The Open University of Israel, 108 Ravutski St., Ra’anana, Israel. E-mail: l.shalev.1@bham.ac.uk

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

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