Shifting visual attention between objects and locations: evidence from normal and parietal lesion subjects

Space- and object-based attention components were examined in neurologically normal and parietal-lesion subjects, who detected a luminance change at 1 of 4 ends of 2 outline rectangles. One rectangle end was precued (75% valid); on invalid-cue trials, the target appeared at the other end of the cued...

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Bibliographic Details
Published inJournal of experimental psychology. General Vol. 123; no. 2; p. 161
Main Authors Egly, R, Driver, J, Rafal, R D
Format Journal Article
LanguageEnglish
Published United States 01.06.1994
Subjects
Adult
Aged
Attention - physiology
Brain Damage, Chronic - physiopathology
Brain Damage, Chronic - psychology
Cues
Dominance, Cerebral - physiology
Female
Humans
Male
Mental Recall - physiology
Middle Aged
Neuropsychological Tests
Orientation - physiology
Parietal Lobe - physiopathology
Pattern Recognition, Visual - physiology
Psychomotor Performance - physiology
Reaction Time - physiology
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Summary:Space- and object-based attention components were examined in neurologically normal and parietal-lesion subjects, who detected a luminance change at 1 of 4 ends of 2 outline rectangles. One rectangle end was precued (75% valid); on invalid-cue trials, the target appeared at the other end of the cued rectangle or at 1 end of the uncued rectangle. For normals, the cost for invalid cues was greater for targets in the uncued rectangle, indicating an object-based component. Both right- and left-hemisphere patients showed costs that were greater for contralesional targets. For right-hemisphere patients, the object cost was equivalent for contralesional and ipsilesional targets, indicating a spatial deficit, whereas the object cost for left-hemisphere patients was larger for contralesional targets, indicating an object deficit.
ISSN:0096-3445
DOI:10.1037/0096-3445.123.2.161