Final answer:
In Schachter and Singer's study, they investigated how the expectation of physiological arousal influenced the interpretation of emotional experiences. Male student volunteers were told about the injection of epinephrine and its side effects, and the results showed that the cognitive appraisal of the situation played a crucial role in the experience of emotions.
Step-by-step explanation:
In Schachter and Singer's classic study of emotion, male student volunteers were told that they were going to receive injections of epinephrine that would cause physiological arousal. Some of the participants were also told to expect these reactions as side effects of the injection, while others were not. The researchers found that those who were not expecting the arousal used context to interpret it as a change in emotional state, while those who were expecting it did not report any emotional changes.