Event Abstract

Task-Related Changes in EEG Affect Go/NoGo Performance

  • 1 School of Pychology, Faculty of Social Sciences, University of Wollongong, Brain & Behaviour Research Institute, Australia
  • 2 National Institute of Complementary Medicine, Western Sydney University, Australia

Aims: Substantial research into the brain dynamics underlying cognitive functioning links the brain’s task-based EEG activity to the stimulus-evoked ERP activity. This study focused on a neglected area of research in this field: how intrinsic EEG changes from rest to the task affect ERP stimulus-response processes and performance. Method: Forty young adults had EEG recorded during eyes-closed (EC) and eyes-open (EO) resting states, and then during an auditory Go/NoGo task. Delta, theta, alpha-1, alpha-2, beta-1, and beta-2 band amplitudes were analysed from the baseline EO state and from the 500 ms of prestimulus activity during the task, as a general measure of task-based EEG. Task-related change was calculated as the difference between prestimulus EEG and the EO state. Stepwise multiple regressions assessed the relationships between task-related EEG change and Go/NoGo behavioural outcomes and ERPs. Results: EEG amplitudes increased from the EO state to the task and these changes were found to significantly affect performance. Delta increases predicted poorer Go response accuracy and variability, and enhanced Go Slow Wave (SW) positivity. Together with this increase in delta, lower alpha-1 increments were associated with longer mean RTs. Theta increases predicted larger Go N1-1 amplitudes but lower NoGo accuracy rates, while beta-1 increments were predictive of NoGo SW negativity. Conclusion: These findings suggest that increases in EEG amplitudes, from the EO state to the task, affect decision-making processes and performance. The present assessment of intrinsic EEG and the change into the task offers novel insights into the brain dynamics underlying cognitive processes.

Keywords: Electroencephalography (EEG), event-related potentials (ERPs), Brain Dynamics, cognitive control, decision-making

Conference: ASP2017: 27th Annual Meeting for the Australasian Society for Psychophysiology, Parramatta, Australia, 29 Nov - 1 Dec, 2017.

Presentation Type: Poster Presentation

Topic: Abstract (General)

Citation: Karamacoska D, Barry RJ, Steiner GZ, Coleman EP and Wilson EJ (2019). Task-Related Changes in EEG Affect Go/NoGo Performance. Conference Abstract: ASP2017: 27th Annual Meeting for the Australasian Society for Psychophysiology. doi: 10.3389/conf.fnhum.2017.224.00006

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Received: 30 Oct 2017; Published Online: 25 Jan 2019.

* Correspondence: Miss. Diana Karamacoska, School of Pychology, Faculty of Social Sciences, University of Wollongong, Brain & Behaviour Research Institute, Wollongong, Australia, dk744@uowmail.edu.au

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