Cognitive Connie
What is two-factor theory?
Stanley Schachter and Jerome Singer's two-factor theory (1962) offers a synthesis between the physiological accounts of James-Lange and Cannon-Bard and the cognitive approach. On their account, emotion requires two components: undifferentiated physiological arousal and a cognitive label that interprets that arousal within the current situation. The same state of arousal can become fear, anger, or euphoria depending on what cognitive label the person applies — and that label depends on the social context, the available explanations, and the person's expectations.
Defining features
Key figures
Stanley Schachter
1922–1997Social psychologist at Columbia University who developed the two-factor theory and ran the 1962 adrenaline study with Jerome Singer. Schachter was a prolific and inventive experimental social psychologist; his work on affiliation under anxiety, obesity, and addiction also drew on the cognitive-labelling framework he developed for emotion.
Jerome Singer
1934–2010Co-developer of the two-factor theory and co-author of the 1962 study. Singer went on to work extensively on emotion, daydreaming, and imagination, and remained a thoughtful sceptic about the theory's excesses, acknowledging its methodological limitations in later writing.
Donald Dutton & Arthur Aron
1943–present / 1945–presentThe suspension bridge study (1974) is the most famous demonstration of misattribution of arousal in naturalistic conditions. Men approached by an attractive female experimenter on a high, swaying bridge were significantly more likely to call her later than those approached on a low, stable bridge — consistent with the misattribution of fear-arousal to attraction.
Key concepts
Two-factor theory
Schachter and Singer's proposal that emotion requires two necessary components: (1) undifferentiated physiological arousal, and (2) a cognitive label that attributes the arousal to a specific emotional cause based on situational cues. Without both, either the emotion will not occur or it will be mislabelled. The theory predicts that the same arousal state can be experienced as different emotions depending on the available cognitive explanation.
Cognitive labelling
The process by which a person attributes their undifferentiated arousal to a specific emotion based on situational cues, prior expectations, or social observation. On Schachter-Singer's account, the cognitive label transforms non-specific arousal into a specific emotional experience. When the environment provides an angry confederate, arousal becomes anger; when it provides a euphoric one, the same arousal becomes euphoria.
Misattribution of arousal
The phenomenon whereby arousal caused by one source (exercise, a drug, fear) is attributed to a different source in the environment, producing an emotional experience that is partially driven by mislabelled arousal. The effect was demonstrated by Dutton and Aron (1974), Zillmann's excitation transfer research, and Valins's false feedback studies. Misattribution effects tend to be small and context-dependent.
Excitation transfer
Dolf Zillmann's extension of Schachter-Singer: residual arousal from one context (e.g., vigorous exercise) can transfer to and intensify an emotional response in a subsequent context (e.g., mild provocation), if the person does not correctly attribute their elevated arousal to the prior activity. Excitation transfer has been used to explain why people feel angrier after exercise and why mildly arousing situations feel more emotionally charged when they follow other arousing events.
Test your knowledge
Frequently asked questions
What did Schachter and Singer's 1962 experiment show?+
Participants injected with epinephrine (which produces real arousal) and placed in a room with an angry or euphoric confederate showed stronger emotional contagion — becoming angrier or more euphoric — than participants who knew they had been given a stimulant. The "ignorant" participants, lacking an explanation for their arousal, attributed it to the environment and the confederate's emotional state. Participants who knew they had been given adrenaline had a ready explanation for their arousal and were not pulled into the confederate's emotional state.
What is misattribution of arousal and why does it matter?+
Misattribution of arousal occurs when physiological arousal from one source is attributed to a different cause, producing an emotional experience partially driven by mislabelled arousal. It matters because it shows that the same physiological state can be experienced as different emotions depending on cognitive framing — with implications for anxiety (physiological arousal misattributed to threat), attraction (fear arousal misattributed to sexual interest), and intervention (reframing "anxiety" arousal as "excitement" can improve performance).
Sources
Last reviewed August 2026- 1.
Schachter, S., & Singer, J. E. (1962). Cognitive, social, and physiological determinants of emotional state. Psychological Review, 69(5), 379–399. https://doi.org/10.1037/h0046234
+About this source
The original two-factor theory paper and the adrenaline experiment.
- 2.
Dutton, D. G., & Aron, A. P. (1974). Some evidence for heightened sexual attraction under conditions of high anxiety. Journal of Personality and Social Psychology, 30(4), 510–517. https://doi.org/10.1037/h0037031
+About this source
The suspension bridge study demonstrating misattribution of arousal in a naturalistic setting.
- 3.
Reisenzein, R. (1983). The Schachter theory of emotion: Two decades later. Psychological Bulletin, 94(2), 239–264. https://doi.org/10.1037/0033-2909.94.2.239
+About this source
Critical review of two decades of research on Schachter-Singer, identifying methodological limitations and partial support.