NeuroLens applies latent-space prediction (JEPA) to chronic intracortical recordings, coupling a day-adaptive cross-attention encoder with calibration-based neuron identities and a shared autoregressive predictor regularized via SIGReg to prevent collapse .
The largest reported gains are on semantic decoding (~38% sentence-embedding improvement over causal NDT), with smaller gains on phoneme (4β16%) and movement (~2%) decoding β consistent with the claim that latent-space prediction captures global semantic structure but adds less value for low-level variables (E2). The phoneme 4β16% range is reported as an interval, not a precise estimate.
Generalization. On 14 chronologically held-out IBL days, pretrained NeuroLens outperformed causal NDT, CEBRA, SPINT, POYO, and POSSM; gradient-free adaptation used only 64 unlabeled calibration trials (E3). On human held-out days (T12: 5 days; T15: 9 days), fully fine-tuned NeuroLens outperformed baselines in phoneme and sentence decoding (E4). Effective rank remained stable as neuron counts declined, unlike causal NDT (E5).
What would change the verdict. If NeuroLens's effective rank declined with neuron loss (the stated falsification criterion for E5), or if the phoneme gain range proved indistinguishable from seed variance, the central claim would weaken. Confidence: moderate β reported values are means over few seeds (five for human boxplots) without CIs.
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