Protection from Harm - Participants were very distressed at the thought of hurting somebody else. negative effects were sweating, trembling, breaking out in nervous laughter and having seizures. It is not acceptable for participants in psychological studies to undergo this level of stress. Milgram should have terminated his research as soon as he noticed the distress they were under. Counterpoint: Nevertheless, there was no evidence of permanent harm in the participants. Forty of the original participants were interviewed one year after the study and none showed signs of emotional distress.