Humans can efficiently look for but not select multiple visual objects.
EEG
MVPA
attentional template
feature-based attention
human
multiple targets
neuroscience
visual search
Journal
eLife
ISSN: 2050-084X
Titre abrégé: Elife
Pays: England
ID NLM: 101579614
Informations de publication
Date de publication:
27 08 2019
27 08 2019
Historique:
received:
07
06
2019
accepted:
26
08
2019
pubmed:
28
8
2019
medline:
6
2
2020
entrez:
28
8
2019
Statut:
epublish
Résumé
The human brain recurrently prioritizes task-relevant over task-irrelevant visual information. A central question is whether multiple objects can be prioritized simultaneously. To answer this, we let observers search for two colored targets among distractors. Crucially, we independently varied the number of target colors that observers anticipated, and the number of target colors actually used to distinguish the targets in the display. This enabled us to dissociate the preparation of selection mechanisms from the actual engagement of such mechanisms. Multivariate classification of electroencephalographic activity allowed us to track selection of each target separately across time. The results revealed only small neural and behavioral costs associated with preparing for selecting two objects, but substantial costs when engaging in selection. Further analyses suggest this cost is the consequence of neural competition resulting in limited parallel processing, rather than a serial bottleneck. The findings bridge diverging theoretical perspectives on capacity limitations of feature-based attention.
Identifiants
pubmed: 31453807
doi: 10.7554/eLife.49130
pii: 49130
pmc: PMC6733593
doi:
pii:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Nederlandse Organisatie voor Wetenschappelijk Onderzoek
ID : 464-13-003
Pays : International
Organisme : H2020 European Research Council
ID : ERC-2013-CoG-615423
Pays : International
Informations de copyright
© 2019, Ort et al.
Déclaration de conflit d'intérêts
EO, JF, Tt, ME, CO No competing interests declared
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