Psychological experiments are scientific studies designed to understand how people think, feel, and behave. Researchers create controlled situations to test specific hypotheses about human behavior. These experiments often involve participants who are observed or asked to complete tasks, allowing scientists to gather data on various psychological concepts. One famous example is the Stanford prison experiment, conducted by Philip Zimbardo in 1971, which explored the effects of perceived power and authority. Another well-known study is Milgram's obedience experiment, which examined how far individuals would go in obeying instructions, even when those instructions conflicted with their personal morals.