The document discusses several theories of emotion: - The James-Lange theory proposes that emotion arises from our awareness of physiological responses to stimuli. We feel fear because our heart is pounding in response to an oncoming car, not the other way around. - The Cannon-Bard theory suggests that stimuli simultaneously trigger both physiological responses and subjective emotional experiences. - Schachter's two-factor theory argues we must be physiologically aroused and cognitively label the arousal to experience an emotion. Seeing a car triggers arousal and the thought "I'm afraid" creates the fear. - Emotions involve two dimensions - valence (positive-negative) and arousal (high-low). They activate the aut