Journal: bioRxiv
Article Title: Classification of Smartphone Interaction Using Multimodal Physiological Signals with a Brain-Body Spatio-Temporal Transformer
doi: 10.64898/2026.05.03.722573
Figure Lengend Snippet: SHAP-permutation importance scatter plots for all five classification tasks. Features are plotted by mean —SHAP— (y-axis) against permutation-based accuracy drop ΔAccuracy (x-axis), colored by modality (green: ET, blue: EEG, orange: PPG, pink: GSR).
Article Snippet: Galvanic skin response/electrodermal activity (GSR/EDA), reflecting sympathetic nervous system arousal associated with behavioral engagement, and PPG, providing cardiac dynamics related to cognitive load and autonomic regulation, were recorded via the BrainVision auxiliary GSR and PPG sensors, respectively.
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