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STAMP: Spatial-Temporal Adapter with Multi-Head Pooling
Proceedings of the Fifth Machine Learning for Health Symposium, PMLR 297:1159-1177, 2026.
Abstract
Time series foundation models ({TSFM}s) pretrained on data from multiple domains have shown strong performance on diverse modeling tasks. Various efforts have been made to develop foundation models specific to electroencephalography ({EEG}) data, which records brain electrical activity as time series. However, no comparative analysis of {EEG}-specific foundation models ({EEGFM}s) versus general {TSFM}s has been performed on {EEG}-specific tasks. We introduce a novel Spatial-Temporal Adapter with Multi-Head Pooling ({STAMP}), which leverages univariate embeddings produced by a general {TSFM}, implicitly models spatial-temporal characteristics of {EEG} data, and achieves performance comparable to state-of-the-art {EEGFM}s. A comprehensive analysis is performed on 8 benchmark datasets of clinical tasks using {EEG} for classification, along with ablation studies. Our proposed adapter is lightweight in trainable parameters and flexible in the inputs it can accommodate, supporting easy modeling of {EEG} data using {TSFM}s.