- Title
- Task-switching costs have distinct phase-locked and nonphase-locked EEG power effects
- Creator
- McKewen, Montana; Cooper, Patrick S.; Wong, Aaron S. W.; Michie, Patricia T.; Sauseng, Paul; Karayanidis, Frini
- Relation
- ARC.DP120100340 http://purl.org/au-research/grants/arc/DP120100340 DP170100756 http://purl.org/au-research/grants/arc/DP170100756
- Relation
- Psychophysiology Vol. 57, Issue 5, no. e13533
- Publisher Link
- http://dx.doi.org/10.1111/psyp.13533
- Publisher
- Wiley
- Resource Type
- journal article
- Date
- 2020
- Description
- Event-related potentials (ERPs) and total time–frequency power analyses have shown that performance costs during task switching are related to differential preparation to switch tasks (switch cost) and repeat the same task (mixing cost) during both proactive control (cue-to-target interval; CTI) and reactive control (post-target). The time–frequency EEG signal is comprised of both phase-locked activity (associated with stimulus-specific processes) and nonphase-locked activity (represents processes thought to persist over longer timeframes and do not contribute to the average ERP). In the present study, we used a cued task-switching paradigm to examine whether phase-locked and nonphase-locked power are differentially modulated by switch and mixing effects in intervals associated with the need for proactive control (CTI) and reactive control (post-target interval). Phase-locked activity was observed in the theta and alpha bands, closely resembled that seen for total power, and was consistent with switch and mixing ERP positivities. Nonphase-locked analyses showed theta and alpha power effects for both switch and mixing effects early in the CTI and as well as more sustained alpha and beta activity around cue onset, and extending from mid-CTI into the post-target interval. Nonphase-locked activity in pretarget alpha and posttarget theta power were both correlated with response time mixing cost. These findings provide novel insight into phase-locked and nonphase-locked activity associated with switch and mixing costs that are not evident with ERP or total time–frequency analyses.
- Subject
- EEG; nonphase-locked power; phase-locked power; task-switching; theta
- Identifier
- http://hdl.handle.net/1959.13/1424183
- Identifier
- uon:38031
- Identifier
- ISSN:0048-5772
- Rights
- This is the peer reviewed version of the following article: McKewen, Montana, Patrick S. Cooper, Aaron SW Wong, Patricia T. Michie, Paul Sauseng, and Frini Karayanidis. "Task‐switching costs have distinct phase‐locked and nonphase‐locked EEG power effects." Psychophysiology 57, no. 5 (2020): e13533.which has been published in final form at: http://dx.doi.org/10.1111/psyp.13533. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
- Language
- eng
- Full Text
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