Neuroscience

From Clever Hans to Scientific Discovery: Interpreting EEG Foundational Transformers with LRP

Justus Meyer zu Bexten, Nico Scherf, Bogdan Franczyk, Simon M. Hofmann

Featured May 27, 2026

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Simply

Applying Layer-wise Relevance Propagation to brain-wave models allows researchers to see which parts of the brain signal the model actually uses, helping to spot fake shortcuts and discover real biological patterns.

In depth

The paper introduces attention-aware LRP as a post-hoc attribution method for EEG foundation models. By propagating relevance scores back through the Transformer architecture, the authors demonstrate that this approach can verify model decisions, identify spurious shortcut learning (Clever Hans behavior), and generate biologically plausible neuroscientific hypotheses.

Key Takeaways

1
Attention-aware LRP successfully provides high-resolution, faithful attribution maps for complex EEG Transformer architectures.
2
The method unmasks Clever Hans behavior, where models rely on ocular artifacts rather than neural signals for motor imagery tasks.
3
Attribution patterns reveal a novel sensorimotor signature of arousal, demonstrating the potential for exploratory neuroscientific discovery.

Conceptual Flow

HIGH LEVEL

Methodology: The Logic

The researchers trace the model's final decision backward to see which specific brain signals were most important.

Brain Signal Data

Trace Decision Backwards

Relevance Heatmap

Results: The Impact

The method reveals whether the model is looking at real brain activity or just cheating by using eye movements.

Model Decision

Identify Decision Strategy

Real Pattern or Shortcut