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We investigated the reading of cAsE mIxInG and contrast reduction on word reading in patients with unilateral parietal lesions and attentional deficits. We show that, compared with control participants, the patients produce selective increases in lateralised errors when reading mixed case relative to same case words. However, there were not reliable increases in lateralised errors when words were degraded by low contrast. The patients also showed some increases in contralesional errors at a task aimed at feature processing in words (a gap detection task), but these effects were not increased for mixed case stimuli and errors were reduced relative to the word reading task. The results are consistent with mixed case words stressing attention-demanding letter identification, drawing-out an impairment in the patients in attending to contralesional stimuli. On the other hand, effects of contrast reduction are accommodated without necessarily recruiting attentional processes mediated by the posterior parietal lobe.

Original publication

DOI

10.1016/j.neuropsychologia.2007.02.016

Type

Journal article

Journal

Neuropsychologia

Publication Date

11/06/2007

Volume

45

Pages

2226 - 2233

Keywords

Aged, Attention Deficit Disorder with Hyperactivity, Brain Injuries, Discrimination Learning, Female, Functional Laterality, Humans, Male, Middle Aged, Neuropsychological Tests, Parietal Lobe, Pattern Recognition, Visual, Photic Stimulation, Reaction Time