Journal
PSYCHOPHYSIOLOGY
Volume 59, Issue 5, Pages -Publisher
WILEY
DOI: 10.1111/psyp.13873
Keywords
cognitive control; executive functions; frontal-midline theta; neurofeedback; training; working memory
Funding
- Deutsche Forschungsgemeinschaft [GRK 1457, SFB 1102/A6]
- Wellcome Trust [AC1710IF09]
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FM theta activity modulation through neurofeedback training can improve cognitive control related to tasks requiring proactive control, such as delayed match to sample, but may not have a significant impact on tasks requiring reactive control, such as the color Stroop task. Transfer effects to both tasks were not observed immediately post-training, suggesting that other factors besides NFT may contribute to performance enhancement.
Frontal-midline (FM) theta activity (4-8 Hz) is proposed to reflect a mechanism for cognitive control that is needed for working memory retention, manipulation, and interference resolution. Modulation of FM theta activity via neurofeedback training (NFT) demonstrated transfer to some but not all types of cognitive control. Therefore, the present study investigated whether FM theta NFT enhances performance and modulates underlying EEG characteristics in a delayed match to sample (DMTS) task requiring mainly proactive control and a color Stroop task requiring mainly reactive control. Moreover, temporal characteristics of transfer were explored over two posttests. Across seven 30-min NFT sessions, an FM theta training group exhibited a larger FM theta increase compared to an active control group who upregulated randomly chosen frequency bands. In a posttest performed 13 days after the last training session, the training group showed better retention performance in the DMTS task. Furthermore, manipulation performance was associated with NFT theta increase for the training but not the control group. Contrarily, behavioral group differences and their relation to FM theta change were not significant in the Stroop task, suggesting that NFT is associated with proactive but not reactive control enhancement. Transfer to both tasks at a posttest one day after training was not significant. Behavioral improvements were not accompanied by changes in FM theta activity, indicating no training-induced modulation of EEG characteristics. Together, these findings suggest that NFT supports transfer to cognitive control that manifests late after training but that other training-unspecific factors may also contribute to performance enhancement.
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