A group of volunteers for a weekend-long live-action role-playing event are randomly assigned to be either 'Nobles' or 'Peasants'. By the second day, many 'Nobles' are acting arrogant and demanding, while many 'Peasants' have become submissive and withdrawn, even though all participants are friends and equals outside of the event. Which statement best analyzes this behavioral shift based on the conclusions of a famous psychological study involving a simulated prison?