Closed-loop EEG feedback pacing alters task load during digital learning

Published October 21, 2026. EEG-guided pacing changed how measured task load developed during a digital learning task, but it did not produce an immediate accuracy advantage. The result supports further work on adaptive learning systems, not a claim of improved learning or clinical benefit.

Sollazzo K, Karran AJ, Rolon-Merette T, Ruiz-Segura A, Coursaris C, Léger PM, Sénécal S.
Scientific Reports · Publication date: 2026-10-21
Added to site: 2026-10-22
DOI: 10.1038/s41598-026-76321-2

Published October 21, 2026. Added to Neurofeedback.com October 22, 2026.

Modalities

EEG, Closed-loop feedback, Neuroadaptive learning

Clinical focus

Task load, Digital learning, Feedback pacing

Population

Participants completing a digital constellation-learning task

Sample

51 participants randomized to adaptive EEG pacing, reward or control conditions

Intervention / method

A frontal-theta and parietal-alpha task-load index adjusted feedback duration between 3 and 8 seconds in the adaptive arm; the reward and control arms received fixed 5-second feedback, with reward participants expecting performance-contingent draw entries

Comparator

EEG-adaptive feedback pacing versus fixed-duration reward and control conditions

Clinician summary

Accuracy improved across blocks in all three groups, with no significant group or group-by-block effect. Task load decreased over time in the adaptive arm, frontal theta and parietal alpha showed group-by-block interactions, and late-session feedback duration shortened; the reward arm reported higher satisfaction.

How to interpret the findings

This was a 51-person laboratory learning experiment rather than a clinical trial. The accessible accepted-version abstract did not provide arm-specific denominators, full effect estimates, confidence intervals, adverse-event detail or evidence that the EEG changes improved retention, transfer or health outcomes. The early article version may receive editorial corrections before the final Version of Record.

Equipment and disclosures

The checked abstract describes EEG-derived frontal theta and parietal alpha feedback but does not identify a device manufacturer. No equipment is attributed to BrainMaster or another vendor.

Supported by NSERC grants RGPIN-2020-06048 and ALLRP 565704-21 and an SSHRC CGS-M award. The authors declared no competing interests. No correction, retraction or expression-of-concern relation appeared in the retained Crossref record; this is a bounded check. AI-assisted review.

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