Research Online

Logo

Goldsmiths - University of London

Investigating evoked and induced electroencephalogram activity in task-related alpha power increases during an internally directed attention task

Cooper, Nicholas R.; Burgess, Adrian P.; Croft, Rodney J. and Gruzelier, John. 2006. Investigating evoked and induced electroencephalogram activity in task-related alpha power increases during an internally directed attention task. NeuroReport, 17(2), pp. 205-208. ISSN 0959-4965 [Article]

No full text available

Abstract or Description

This study sought to explore whether the so-called 'paradoxical' task-related increases in the α bandwidth of the human electroencephalogram result from increases in evoked (phase locked), as opposed to induced (non-phase locked), activity. The electroencephalograms of 18 participants were recorded while they engaged in both auditory sensory-intake tasks (listening to randomly generated 'tunes') and internally directed attention tasks (imagining the same randomly generated tunes) matched for auditory input. Measures of evoked (phase locked) and induced (non-phase locked) activity were compared between tasks. Increases in induced α power were found during internal attention. No experimental effects were observed for evoked activity. These results are not entirely consistent with proposals that 'paradoxical' α indexes the evoked inhibition of task irrelevant processing.

Item Type:

Article

Departments, Centres and Research Units:

Psychology

Dates:

DateEvent
2006Published

Item ID:

5288

Date Deposited:

16 Mar 2011 14:32

Last Modified:

30 Jun 2017 15:27

Peer Reviewed:

Yes, this version has been peer-reviewed.

URI:

http://research.gold.ac.uk/id/eprint/5288

Edit Record Edit Record (login required)