Fig. 6: Identification of important features through SHAP in the affective 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 and naming convention: channel—channel number - biomarker (HbO or HbR)—calculated feature value (average, maximum, minimum, peak, slope, and kurtosis). Darker red denotes higher activity values, while lighter blue represents lower activity values. In the AF group, key brain regions that predicted transfer scores included the supramarginal gyrus (SMG), dorsolateral prefrontal cortex (DLPFC), middle temporal gyrus (MTG), and frontopolar area (FP).
