Riding Brainwaves in LLM Space: Understanding Activation Patterns Using Individual Neural Signatures

ArXi:2603.21847v1 Announce Type: new Consumer-grade EEG is entering everyday devices, from earbuds to headbands, raising the question of whether language models can be adapted to individual neural responses. We test this by asking whether frozen LLM representations encode person-specific EEG signals, directions in activation space that predict one person's brain activity but not another's.