Repetition of distractor sets improves visual search performance in hemispatial neglect
| Autor: | Sigrún Sif Jóelsdóttir, Haukur Hjaltason, Árni Kristjánsson, Styrmir Saevarsson |
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| Rok vydání: | 2008 |
| Předmět: |
Male
genetic structures Cognitive Neuroscience media_common.quotation_subject Experimental and Cognitive Psychology Context (language use) Neglect Developmental psychology Discrimination Learning Perceptual Disorders Behavioral Neuroscience Perception Reaction Time medicine Humans Attention media_common Visual search Hemispatial neglect Cognition Middle Aged Visual field Pattern Recognition Visual Set Psychology Visual Perception Female medicine.symptom Psychology Priming (psychology) Photic Stimulation Cognitive psychology |
| Zdroj: | Neuropsychologia. 46:1161-1169 |
| ISSN: | 0028-3932 |
| DOI: | 10.1016/j.neuropsychologia.2007.10.020 |
| Popis: | Priming from repeated distractor sets, or search context, in conjunctive visual search was examined in four patients with hemispatial neglect. In the first experiment overall context was either changed or repeated while the target was always the same to control for any modulatory effect of target priming. Considerable priming was seen from repeated context. In the second experiment the context was either repeated on the left side, on the right side, on both sides, or the context was new. Priming from repeated context was found to arise from the left visual field, as well as the right visual field, as well as when overall context was repeated. Brief masked displays were used in experiment 3, the results again showing strong priming from repeated overall context. The results of the three experiments suggest that visual grouping, or perceptual organization, of distractor sets is relatively intact in the affected hemifield of parietal neglect patients. Furthermore, repetition of context may even temporarily ameliorate neglect symptoms in search. These findings are consistent with claims that grouping is distinct from attentional processing and that it operates at lower levels of the perceptual hierarchy. |
| Databáze: | OpenAIRE |
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