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Revisiting the Model Human Processor: a neurophysiological investigation based on P300 and Bereitschaftspotential.
Toshitaka Higashino1, Naoki Wakamiya1
1Graduate School of Information Science and Technology, The University of Osaka, Suita, Japan.
Frontiers in Human Neuroscience
|November 13, 2025
Summary
This study reveals two distinct human processing pathways: a deliberate, P300-present route and a faster, P300-absent automatic route. This neurophysiological evidence validates the Model Human Processor and supports dual-process theory.
Area of Science:
- Cognitive Neuroscience
- Human-Computer Interaction
- Psychology
Background:
- The Model Human Processor (MHP) is a foundational cognitive architecture.
- Direct neurophysiological validation for the MHP remains limited.
- Brainwave components like P300 and Bereitschaftspotential (BP) offer potential markers for cognitive processes.
Purpose of the Study:
- To neurophysiologically validate and extend the Model Human Processor (MHP).
- To investigate the neural underpinnings of human information processing using P300 and BP.
- To test the hypothesis that correct trials comprise mixed processing types.
Main Methods:
- Analysis of P300 and Bereitschaftspotential (BP) brainwave components.
- Segregation of correct trials based on P300 presence or absence.
- Comparison of neural signatures and reaction times between P300-present and P300-absent subgroups.
Main Results:
- A distinct P300-absent subgroup was identified among correct responses.
- This subgroup exhibited significantly shorter reaction times compared to P300-present trials.
- The P300-absent subgroup's neural signature resembled that of incorrect trials, including a delayed BP peak.
Conclusions:
- Human information processing is not monolithic, suggesting parallel pathways.
- A dual-process model is proposed: a 'Deliberate Process' (P300-present) and a 'High-Speed Automatic Process' (P300-absent).
- Findings provide neurophysiological support for the MHP and dual-process theory in cognitive psychology.
