EEG signal classification based on a Riemannian distance measure
Bibliographic record
Abstract
We proposed a k-nearest neighbor EEG signal classification algorithm using a dissimilarity measure defined with a Riemannian distance. The EEG signals are characterized by curves on the manifold of power spectral density matrices. By endowing the manifold with a Riemannian metric we obtain the Riemanian distance between two points on the manifold. Based on this, the measure of dissimilarity is then defined. To best facilitate the classification of similar and dissimilar EEG signal sets, we obtain the optimally weighted Riemannian distance aiming to render signals in different classes more separable while those in the same class more compact. The motivation of the algorithm design and verification method are also provided. Experimental results are presented showing the superior performance of the new metric in comparison to the k-nearest neighbor EEG signal classification algorithm using the commonly used Kullback-Leibler (KL) dissimilarity measure.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".