What key behavior did participants exhibit in Milgram's study?

In Milgram's study, participants demonstrated a significant willingness to comply with harmful commands issued by an authority figure, showcasing how individuals can engage in behaviors they would typically find objectionable when instructed by someone perceived to have legitimate authority. This study highlighted the power of situational factors and authority in influencing behavior, revealing that many people are willing to inflict pain on others if directed to do so by an authoritative presence.

The study's findings led to important discussions around ethical considerations in research, the nature of obedience, and the potential for individuals to act against their moral convictions under authoritative pressure. This insight has been influential in understanding social psychology, particularly in contexts where authority dynamics are at play.