Fig. 7: Identification of important features through SHAP in the neutral feedback group.
From: Effects of different AI-driven Chatbot feedback on learning outcomes and brain activity
The left side of the ordinate lists the feature names, following the naming convention: channel - channel number - biomarker (HbO or HbR) - calculated feature value (average, maximum, minimum, peak, slope, or kurtosis). Darker red denotes higher activity values, while lighter blue represents lower activity values. In the NF group, key brain regions that predicted transfer scores included the supramarginal gyrus (SMG), middle temporal gyrus (MTG), frontopolar area (FP), dorsolateral prefrontal cortex (DLPFC).
