 While they were waiting, a confederate (a participant who is also covertly collaborating with/an associate of the researchers) who was either euphoric or angry waited with the participant to see if the emotion of the participant could be manipulated by the epinephrine and the emotion of the confederate.The confederate played basketball with pieces of balled up scrap paper while in the euphoric state or had to take a questionnaire and became very angry with the personal questions in the anger state.The participants then were observed to see if they appeared to be angry or euphoric and took a self-reported survey about their mood.