This research attempts to extract and quantify dynamic emotion transition (DET) psychophysiological features. The DET features are defined and explored based on neurophysiological dynamics underlying emotion hysteresis theory, which could potentially explain individual differences in emotion processing of environmental changing stimuli. Directional changing stimuli probes are used for attentive and preattentive stimuli-induced emotional processing. Three progressive paradigms examine hysteresis with multimodal emotion detection techniques including central and peripheral physiological measurements. The DET, an individualized feature, representing abrupt changes in emotion responses, could lead to an enhanced Brain-Computer Interface system for monitoring stress and detecting changes in emotion. This could then provide timely restorative feedback stimuli for emotion regulation training. Moreover, this approach is promising for mental disorder diagnostic and prognostic tools.