Final answer:
The statement that best expresses one result of the Schachter and Singer's experiment is that participants with no explanation for their arousal reported emotions aligning with the confederate's actions, highlighting the importance of cognitive appraisal in emotional experiences.
Step-by-step explanation:
The best statement that expresses one result of Schachter and Singer's classic experiment is that participants given no explanation for their arousal reported emotions consistent with the behavior of the confederate. This finding supports the two-factor theory of emotion, which posits that emotional experiences are composed of two factors: physiological arousal and cognitive appraisal. Furthermore, the theory indicates that in the absence of a cognitive explanation for arousal, individuals will use the environmental context to label their emotional state.
In Schachter and Singer's study, participants who were unaware that the injection of epinephrine would cause physiological arousal were more likely to interpret their arousal based on the situation and the behavior of the confederate, reporting feelings of euphoria or anger. This contrasts with those who were informed about the expected physical reactions and thus did not attribute their arousal to their emotional state. These results illustrate the important role of cognitive factors in the interpretation and experience of emotions.