Jack took a pill that increases his sympathetic nervous system arousal. According to Schachter and Singer's theory, putting him in an emotional situation and telling him that the pill will have no effect, would increase the chance of experiencing a strong emotion by him.
The two-factor theory of emotion was given by Stanley Schachter and Jerome E. Singer. According to Schachter and Singer's theory, an emotion is built on two factors i.e. physiological arousal as well as cognitive label.
The theory suggests that when an emotion is perceived, a physiological arousal takes place and the person makes use of the existing surroundings to look for emotional signals to tag the physiological arousal through cognition.
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