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The Two-Factor Theory of Emotion

Schachter and Singer's Theory of Emotion

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Cognitive theories of emotion began to emerge during the 1960s, starting with one proposed by Stanley Schachter and Jerome Singer known as the two-factor theory of emotion.

What Is the Two-Factor Theory?

Like the James-Lange theory of emotion, Schachter and Singer felt that physical arousal plays a primary in emotions. However, they suggested that this arousal was the same for a wide variety of emotions, so physical arousal alone could not be responsible for emotional responses.

The two-factor theory of emotion focuses on the interaction between physical arousal and how we cognitively label that arousal.

So, imagine you are alone in a dark parking lot walking toward your car. A strange man suddenly emerges from a nearby row of trees and rapidly approaches. The sequence that follows, according to the two-factor theory, would be much like this:

1. I see a strange man walking toward me.
2. My heart is racing and I am trembling.
3. My rapid heart rate and trembling are caused by fear.
4. I am frightened!

The process begins with the stimulus (the strange man), which is followed by the physical arousal (rapid heartbeat and trembling). Added to this is the cognitive label (associating the physical reactions to fear), which is immediately followed by the conscious experience of the emotion (fear).

Schachter and Singer?s Experiment

In a 1962 experiment, Schachter and Singer put their theory to the test. A group of 184 male participants were injected with epinephrine, a hormone that produces arousal including increased heartbeat, trembling and rapid breathing. All of the participants were told that they were being injected with a new drug to test their eyesight. However, one group of participants was informed of the symptoms the injection might cause, while other participants were not.

Participants were then placed in a room with another participant who was actually a confederate in the experiment. The confederate either acted in one of two ways: euphoric or angry. Participants who had not been informed about the effects of the injection were more likely to feel either happier or angrier than those who had been informed.

Criticism of Two-Factor Theory

While Schachter and Singer?s research spawned a great deal of further research, their theory has also been subject to criticism. Other researchers have only partially supported the findings of the original study, and have had times shown contradictory results.

Other criticisms of the two-factor theory:

  • Sometimes emotions are experienced before we think about them.
  • Other researchers have supported James-Lange?s initial suggestion that there are actual physiological differences between emotions.

References

Marshall, G., & Zimbardo, P. G. (1979). Affective consequences of inadequately explained physiological arousal. Journal of Personality and Social Psychology, 37, 970-988.

Reisenzein, R. (1983). The Schachter theory of emotion: Two decades later. Psychological Bulletin, 94, 239-264.

Schachter, S. and Singer, J. E. (1962) Cognitive, social and physiological determinants of emotional states, Psychological Review, 69, 379-399

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