Final answer:
The Schachter-Singer theory of emotion proposes that emotions are the result of physiological arousal and cognitive appraisal. An experiment involving epinephrine injection supports this theory by showing how cognitive labeling influences the interpretation of physiological arousal as an emotional experience.
Step-by-step explanation:
The Schachter-Singer theory of emotion suggests that our subjective emotional experience depends on both physiological arousal and cognitive appraisal. According to this theory, emotions are composed of two factors - physiological arousal and cognitive labeling.
A key experiment supporting this theory involved injecting participants with epinephrine, causing physiological changes similar to the fight-or-flight response. Participants who were informed about the side effects of the injection were more likely to interpret their arousal as an emotional experience based on the context. This experiment demonstrates the role of cognitive appraisal in the emotional experience, which supports the Schachter-Singer theory.