Abstract
Our minds are continuously alternating between external attention (EA) and mind wandering (MW). An appropriate balance between EA and MW is important for promoting efficient perceptual processing, executive functioning, decision-making, auto-biographical memory, and creativity. There is evidence that EA processes are associated with increased activity in high-frequency EEG bands (e.g., SMR), contrasting with the dominance of low-frequency bands during MW (e.g., Theta). The aim of the present study was to test the effects of two distinct single session real-time EEG (rtEEG) protocols (SMR up-training/Theta down-training—SMR⇑Theta⇓; Theta up-training/SMR down-training—Theta⇑SMR⇓) on EA and MW processes. Thirty healthy volunteers were randomly assigned to one of two rtEEG training protocols (SMR⇑Theta⇓; Theta⇑SMR⇓). Before and after the rtEEG training, participants completed the attention network task (ANT) along with several MW measures. Both training protocols were effective in increasing SMR (SMR⇑Theta⇓) and theta (Theta⇑SMR⇓) amplitudes but not in decreasing the amplitude of down-trained bands. There were no significant effects of the rtEEG training in either EA or MW measures. However, there was a significant positive correlation between post-training SMR increases and the use of deliberate MW (rather than spontaneous) strategies. Additionally, for the Theta⇑SMR⇓ protocol, increase in post-training Theta amplitude was significantly associated with a decreased efficiency in the orientation network.
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Funding
Óscar F. Gonçalves was funded by the Brazilian National Counsel for Scientific and Technological Development (CNPq) as a special visiting researcher (Grant 401143/2014-7). This study was partially conducted at the Psychology Research Centre (UID/PSI/01662/2013), University of Minho, and supported by the Portuguese Foundation for Science and Technology and co-financed by FEDER through COMPETE2020 under the PT2020 (Grant POCI-01-0145-FEDER-007653). Paulo S. Boggio is a CNPq researcher fellow (Grant 311641/2015-6). SC is funded through the Portuguese Foundation for Science and Technology (IF/00091/2015). JL is funded through the Portuguese Foundation for Science and Technology (PTDC/MHC-PCN/3950/2014).
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All participants provided signed informed consent and the study was approved by the local review board and carried out in accordance with The Code of Ethics of the World Medical Association (Declaration of Helsinki).
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Gonçalves, Ó.F., Carvalho, S., Mendes, A.J. et al. Neuromodulating Attention and Mind-Wandering Processes with a Single Session Real Time EEG. Appl Psychophysiol Biofeedback 43, 143–151 (2018). https://doi.org/10.1007/s10484-018-9394-4
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DOI: https://doi.org/10.1007/s10484-018-9394-4