The distractor positivity ( Pd) signals lowering of attentional priority: Evidence from event-related potentials and individual differences.
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| Title: | The distractor positivity ( Pd) signals lowering of attentional priority: Evidence from event-related potentials and individual differences. |
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| Authors: | Burra, Nicolas, Kerzel, Dirk |
| Source: | Psychophysiology. Jul2014, Vol. 51 Issue 7, p685-696. 12p. |
| Subjects: | Electrophysiology, Visual memory, Liquid crystal displays, Electroencephalography, University of Geneva, Eye movements |
| Abstract: | We investigated the effects of task demands and individual differences on the allocation of attention. Using the same stimuli, participants indicated the orientation of a line contained in a shape singleton (identification task) or the presence of singletons (detection task). Shape singletons in the identification task elicited a contralateral negativity ( N2pc) whereas shape singletons in the detection task elicited a contralateral positivity ( Pd). We suggest that the reduction of attentional priority of a salient stimulus, reflected by the Pd, occurred more rapidly with the less demanding detection task. Further, fewer distractible participants showed a larger N2pc to lateral color distractors than highly distractible participants. We suggest that highly distractible participants developed compensatory mechanisms to suppress distracting stimuli. [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | We investigated the effects of task demands and individual differences on the allocation of attention. Using the same stimuli, participants indicated the orientation of a line contained in a shape singleton (identification task) or the presence of singletons (detection task). Shape singletons in the identification task elicited a contralateral negativity ( N2pc) whereas shape singletons in the detection task elicited a contralateral positivity ( Pd). We suggest that the reduction of attentional priority of a salient stimulus, reflected by the Pd, occurred more rapidly with the less demanding detection task. Further, fewer distractible participants showed a larger N2pc to lateral color distractors than highly distractible participants. We suggest that highly distractible participants developed compensatory mechanisms to suppress distracting stimuli. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00485772 |
| DOI: | 10.1111/psyp.12215 |
