a control because they were not experiencing a physiological change and have no emotion of label. After the injection, a confederate interacted with the students, who was either acting euphoric or angry. The experimenters watched through a one way mirror and rated the participants' state on a three category scale. The participants were then given a questionnaire and their heart rate was checked. The researchers found that the impact of the confederate was different for the participants in the different conditions. From high to low euphoria their ranking was as follows: epinephrine misinformed, epinephrine ignorant, placebo, epinephrine informed. In the anger condition the ranking was: epinephrine ignorant, placebo, epinephrine informed. Both results show that those participants who had no explanation of why their body felt as it did, were more susceptible to the confederate. These findings are considered to support the researchers' hypotheses. Misattribution of arousal The misattribution of arousal study tested Schachter and Singer's two-factor theory of emotion. Psychologists Donald G. Dutton and Arthur P. Aron wanted to use a natural setting that would induce physiological arousal. In this experiment, they had male participants walk across two different styles of bridges. One bridge was a very scary (arousing) suspension bridge, which was very narrow and suspended above a deep ravine. The second bridge was much safer and more stable than the first. At the end of each bridge an attractive female experimenter met the [male] participants. She gave the participants a questionnaire which included an ambiguous picture to describe and her number to call if they had any further questions. The idea of this study was to find which group of males were more likely to call the female experimenter and to measure the sexual content of the stories the men wrote after crossing one of the bridges. They found that the men who walked across the scary bridge were more likely to call the woman to follow up on the study, and that their stories had more sexual content. The two-factor theory would say that this is because they had transferred (misattributed) their arousal from fear or anxiety on the suspension bridge to higher levels of sexual feeling towards the female experimenter. Schachter & Wheeler In the Schachter & Wheeler (1962) study the subjects were injected with epinephrine, chlorpromazine, or a placebo (chlorpromazine is a neuroleptic, i.e., an antipsychotic). None of the subjects had any information about the