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What is novel in the novelty oddball paradigm? Functional significance of the novelty P3 event-related potential as revealed by independent component analysis

What is novel in the novelty oddball paradigm? Functional significance of the novelty P3 event-related potential as revealed by independent component analysis
What is novel in the novelty oddball paradigm? Functional significance of the novelty P3 event-related potential as revealed by independent component analysis
To better understand whether voluntary attention affects how the brain processes novel events, variants of the auditory novelty oddball paradigm were presented to two different groups of human volunteers. One group of subjects (n=16) silently counted rarely presented ‘infrequent’ tones (p=0.10), interspersed with ‘novel’ task-irrelevant unique environmental sounds (p=0.10) and frequently presented ‘standard’ tones (p=0.80). A second group of subjects (n=17) silently counted the ‘novel’ environmental sounds, the ‘infrequent’ tones now serving as the task-irrelevant deviant events. Analysis of event-related potentials (ERPs) recorded from 63 scalp channels suggested a spatiotemporal overlap of fronto-central novelty P3 and centro-parietal P3 (P3b) ERP features in both groups. Application of independent component analysis (ICA) to concatenated single trials revealed two independent component clusters that accounted for portions of the novelty P3 and P3b response features, respectively. The P3b-related ICA cluster contributed to the novelty P3 amplitude response to novel environmental sounds. In contrast to the scalp ERPs, the amplitude of the novelty P3 related cluster was not affected by voluntary attention, that is, by the target/nontarget distinction. This result demonstrates the usefulness of ICA for disentangling spatiotemporally overlapping ERP processes and provides evidence that task irrelevance is not a necessary feature of novelty processing.
ICA, ERP, single-trial analysis, P300, novelty P3, P3b, spatiotemporal overlap
0926-6410
309-321
Debener, Stefan
e6bf9143-09a8-45c0-8536-3564885375d4
Makeig, Scott
13e376cb-709c-4377-ba95-9f55f312d9ec
Delorme, Arnaud
9aa63e16-3a16-49c0-89b7-e08108d06c8e
Engel, Andreas K.
4c9e2742-c147-46d6-b750-bcab4b5baf34
Debener, Stefan
e6bf9143-09a8-45c0-8536-3564885375d4
Makeig, Scott
13e376cb-709c-4377-ba95-9f55f312d9ec
Delorme, Arnaud
9aa63e16-3a16-49c0-89b7-e08108d06c8e
Engel, Andreas K.
4c9e2742-c147-46d6-b750-bcab4b5baf34

Debener, Stefan, Makeig, Scott, Delorme, Arnaud and Engel, Andreas K. (2005) What is novel in the novelty oddball paradigm? Functional significance of the novelty P3 event-related potential as revealed by independent component analysis. Brain Research, 22 (3), 309-321. (doi:10.1016/j.cogbrainres.2004.09.006).

Record type: Article

Abstract

To better understand whether voluntary attention affects how the brain processes novel events, variants of the auditory novelty oddball paradigm were presented to two different groups of human volunteers. One group of subjects (n=16) silently counted rarely presented ‘infrequent’ tones (p=0.10), interspersed with ‘novel’ task-irrelevant unique environmental sounds (p=0.10) and frequently presented ‘standard’ tones (p=0.80). A second group of subjects (n=17) silently counted the ‘novel’ environmental sounds, the ‘infrequent’ tones now serving as the task-irrelevant deviant events. Analysis of event-related potentials (ERPs) recorded from 63 scalp channels suggested a spatiotemporal overlap of fronto-central novelty P3 and centro-parietal P3 (P3b) ERP features in both groups. Application of independent component analysis (ICA) to concatenated single trials revealed two independent component clusters that accounted for portions of the novelty P3 and P3b response features, respectively. The P3b-related ICA cluster contributed to the novelty P3 amplitude response to novel environmental sounds. In contrast to the scalp ERPs, the amplitude of the novelty P3 related cluster was not affected by voluntary attention, that is, by the target/nontarget distinction. This result demonstrates the usefulness of ICA for disentangling spatiotemporally overlapping ERP processes and provides evidence that task irrelevance is not a necessary feature of novelty processing.

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More information

Published date: 2005
Keywords: ICA, ERP, single-trial analysis, P300, novelty P3, P3b, spatiotemporal overlap

Identifiers

Local EPrints ID: 27564
URI: https://eprints.soton.ac.uk/id/eprint/27564
ISSN: 0926-6410
PURE UUID: 3cb6021a-ec74-4579-8254-d6e4b8a9fe78

Catalogue record

Date deposited: 25 Apr 2006
Last modified: 11 Jul 2017 09:46

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