Philip Zimbardo
Psychologist known for the Stanford prison experiment and heroism research.
Philip George Zimbardo was an American psychologist and a professor at Stanford University, internationally known as an educator, researcher, author, and media personality. He authored over 500 articles, chapters, textbooks, and trade books on subjects such as time perspective, cognitive dissonance, the psychology of evil, persuasion, cults, deindividuation, shyness, and heroism. Zimbardo is most famous for his 1971 Stanford prison experiment, which later drew criticism for methods that allowed his own biases to potentially influence the results. He wrote widely used introductory psychology textbooks, including *Psychology and Life* and *Psychology: Core Concepts*, and other notable works like *Shyness*, *The Lucifer Effect*, and *The Time Paradox*. He founded the Heroic Imagination Project, a nonprofit training people to resist bullying, bystanding, and negative conformity, and pioneered The Stanford Shyness Clinic in the 1970s, offering the first comprehensive shyness treatment program. Zimbardo received numerous honorary degrees and awards, including the Carl Sagan Award for Public Understanding of Science for his PBS series *Discovering Psychology*, which won an Emmy. He served as president of the Western Psychological Association in 1983 and 2001, and as American Psychological Association president in 2002. Born in New York City in 1933 to a Sicilian-American immigrant family, he grew up poor on welfare in the South Bronx and experienced discrimination, which sparked his curiosity about behavior. He earned a B.A. summa cum laude from Brooklyn College in 1954 and an M.S. and Ph.D. from Yale University. He taught at Yale, New York University, and Columbia before joining Stanford in 1968, where he taught for 50 years. After retiring in 2003, he continued lecturing at Stanford, Palo Alto University, and the Naval Postgraduate School. He organized teach-ins on civil rights and led a walk-out at an NYU graduation to protest an honorary degree for Robert McNamara. He was married to Christina Maslach, who helped end the Stanford prison experiment, and had three children.
- field
- Psychology
- nationality
- American
- known_for
- Stanford prison experiment; research on shyness, heroism, and the psychology of evil
Verified Timeline
Lore & Background
Philip Zimbardo was a second-generation Sicilian-American who grew up in the South Bronx, where his family lived on welfare and he faced prejudice because of his Italian heritage. As a young child, he survived a serious contagious illness that required a prolonged stay at Willard Parker Hospital, a facility for children with infectious diseases; it was during this hospitalization that he taught himself to read. He attended New York Public School 52 and later graduated from James Monroe High School, becoming the first member of his family to earn a college degree. After completing a triple major in psychology, sociology, and anthropology at Brooklyn College, he earned his master’s and doctoral degrees in psychology from Yale University. His academic career began at Yale, followed by positions at New York University and Columbia University, before he joined the faculty at Stanford University in 1968, where he remained for half a century. He was known for his distinctive appearance, often seen with a neatly trimmed beard and glasses, and for his energetic, accessible teaching style. His defining characteristics included a lifelong commitment to making psychological concepts understandable to the public, as seen in his PBS series *Discovering Psychology*, and his pioneering work on shyness, time perspective, and the psychology of evil. He founded the Stanford Shyness Clinic and later the Heroic Imagination Project, a nonprofit aimed at training people to resist negative social influences and promote everyday heroism.
Reader's Guide
Philip Zimbardo's significance lies in his wide-ranging contributions to psychology, most notably the Stanford prison experiment, which sparked enduring debate about the power of situational forces on individual behavior. The experiment's later criticism for methodological bias highlights ongoing tensions in experimental design. Beyond this, Zimbardo pioneered treatment for shyness through the Stanford Shyness Clinic and founded the Heroic Imagination Project to promote everyday heroism. His work on the psychology of evil, particularly in The Lucifer Effect, applied lessons from the prison study to real-world abuses such as the Abu Ghraib scandal. He also made psychology accessible to the public through his PBS series Discovering Psychology and numerous textbooks. His legacy includes influencing how social psychology is taught and understood, while his career reflects both the reach and the controversies of experimental social psychology.
Did You Know?
- Zimbardo was the first member of his family to pursue a college degree.
- He organized a walk-out at an NYU graduation ceremony to protest an honorary degree for Robert McNamara.
- His wife Christina Maslach played a role in concluding the Stanford Prison Experiment.
- He collaborated with Allen Funt of Candid Camera to produce educational videos for psychology classes.
Frequently Asked Questions
Why is the Stanford prison experiment controversial?
Critics have argued that Zimbardo, as both the experiment's designer and an active on-site participant, may have nudged participants toward more extreme behavior through his own expectations and cues. This raised serious questions about whether the results reflected genuine psychological processes or the researcher's influence.
Why is Philip Zimbardo considered important in psychology?
He helped shift both public and academic attention toward how ordinary people can be drawn into harmful roles by situational pressure, a theme that still informs debates on authority, obedience, and moral responsibility. His prolific writing and media presence made complex social-psychology concepts accessible to a general audience.
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