Model Human Processor revisited with P300 and Bereitschaftspotential for EEG-BCI

• A neurophysiological investigation revisits the Model Human Processor using P300 and Bereitschaftspotential (Frontiers).¹
• P300 and Bereitschaftspotential underpin EEG-BCI paradigms (e.g. P300 spellers) and human neurophysiology; work updates cognitive modeling with electrophysiological evidence.^{1 1}

Weekly enrichment (2026-07-20)

• The study validates and extends the Model Human Processor (MHP) by pairing the stimulus-locked P300 (marking the end of cognitive evaluation) with the response-locked Bereitschaftspotential (BP/readiness potential, marking the start of self-initiated motor preparation).^{2 3}
• EEG was recorded with an OpenBCI Cyton system and ThinkPulse active electrodes at 256 Hz, using Cz for the P300 (P3b) and C3 (over left motor cortex, contralateral to the right-hand button press) for the BP, with mastoid references and Fp1 ground.²
• Ten young adults (9 male, 1 female; mean age 23.4 years) at The University of Osaka participated in both experiments.²
• Experiment 1 validated the paradigms: a visual oddball task (1:3 target ratio) elicited a P300 peak around 400 ms, and a self-paced button-press task elicited a BP beginning around −1000 ms before movement.²
• Experiment 2 used four tasks of increasing cognitive load (Simple Reaction, Match, Recognize, Class Match) built on the oddball paradigm to add MHP subprocesses (Match, Recognize, Classify, Initiate Response).²
• The authors identified a “P300-absent” subgroup even among correct responses that showed significantly shorter reaction times and a neural signature resembling incorrect trials, including a delayed negative BP peak.^{2 3}
• They propose that processing bifurcates after perception into a “Deliberate Process” (P300-present, matching the MHP) and a high-speed “Automatic Process” (P300-absent) that bypasses the MHP’s “Initiate Response” stage, offering neural support for dual-process theory.^{2 3}
• Published in Frontiers in Human Neuroscience (2025), volume 2025:1690746, DOI 10.3389/fnhum.2025.1690746; sample size is small and exploratory (hypothesis-generating).^{2 3}
• BCI implication: P300 and BP are core signals for EEG-BCI paradigms (e.g., P300 spellers and movement-intent decoding), so distinguishing deliberate versus automatic routes could refine timing assumptions in ERP-based interfaces.^{2 4}

Footnotes

1. https://news.google.com/rss/articles/CBMinAFBVV95cUxOTDRrTUZEMjhjVVRLLTltcjlMVC1xM05teGhoMk1sWkhnUmE3bUw5Tk1UTGV2S2RUMFJmZDlqbXk4YThJak1GTDJFTWpNUDF0Ty1vd1ltcnRKMGM4djNweFB5ZmtZSnVXRWVKTTR0VnFXZVZkQzlKR2UtV1dIUmFBaFZESkgwLTlnV29KYVlmQ05XbHA2NS1nalN1WUc?oc=5 ↩ ↩² ↩³

2. https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2025.1690746/full ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹

3. https://doi.org/10.3389/fnhum.2025.1690746 ↩ ↩² ↩³ ↩⁴

4. https://doi.org/10.1016/j.procs.2019.09.373 ↩