Target and distractor processing and the influence of load on the allocation of attention to task-irrelevant threat
Bretherton, P.M. and Eysenck, M.W. and Richards, Anne and Holmes, A. (2017) Target and distractor processing and the influence of load on the allocation of attention to task-irrelevant threat. Neuropsychologia , ISSN 0028-3932. (In Press)
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Abstract
This study investigated the characteristics of two distinct mechanisms of attention – stimulus enhancement and stimulus suppression – using an event-related potential (ERP) approach. Across three experiments, participants viewed sparse visual search arrays containing one target and one distractor. The main results of Experiments 1 and 2 revealed that whereas neural signals for stimuli that are not inherently salient could be directly suppressed without prior attentional enhancement, this was not the case for stimuli with motivational relevance (human faces). Experiment 3 showed that as task difficulty increased, so did the need for suppression of distractor stimuli. It also showed the preferential attentional enhancement of angry over neutral distractor faces, but only under conditions of high task difficulty, suggesting that the effects of distractor valence on attention are greatest when there are fewer available resources for distractor processing. The implications of these findings are considered in relation to contemporary theories of attention.
Metadata
| Item Type: | Article |
|---|---|
| Keyword(s) / Subject(s): | Attentional Capture, Suppression, Load, ERP, Threat, NT, PD, ND, N2pc |
| School: | Birkbeck Schools and Departments > School of Science > Psychological Sciences |
| Depositing User: | Anne Richards |
| Date Deposited: | 26 Oct 2017 07:04 |
| Last Modified: | 26 Jul 2019 22:50 |
| URI: | http://eprints.bbk.ac.uk/id/eprint/20167 |
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