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Single Trial Detection and Extraction of Event-Related Potentials in Electroencephalography Signals.
Rel. Roberto Garello, Vito De Feo. Politecnico di Torino, Master of science program in Communications Engineering, 2026
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Abstract
Electroencephalography (EEG) signals represent the summed electrical activity of neural processes in the brain. Isolating specific neural responses within EEG recordings is challenging due to the inherently low signal-to-noise ratio. For this reason, a common approach is to average multiple stimulus-locked trials in order to extract the corresponding event-related potential (ERP). However, trial averaging suppresses intra-subject variability and removes dynamic information that may carry physiologically meaningful signatures of cognitive state. In contrast, single-trial analysis enables real-time interpretation, preserves temporal variability, and supports personalized modeling. This approach, however, requires methods capable of detecting weak, nonlinear, and noise-contaminated neural responses without relying on repeated averaging.
In this work, we address this challenge using the Nonlinear Information Correlation (NIC), a dependence measure designed to quantify predictive structure between EEG segments and stimulus-related templates at the single-trial level
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