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Philip George Zimbardo (; born March 23, 1933) is an American psychologist and a
professor emeritus ''Emeritus'' (; female: ''emerita'') is an adjective used to designate a retired chair, professor, pastor, bishop, pope, director, president, prime minister, rabbi, emperor, or other person who has been "permitted to retain as an honorary title ...
at
Stanford University Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is conside ...
. He became known for his 1971
Stanford prison experiment The Stanford prison experiment (SPE) was a psychological experiment conducted in the summer of 1971. It was a two-week simulation of a prison environment that examined the effects of situational variables on participants' reactions and beh ...
, which was later severely criticized for both ethical and scientific reasons. He has authored various introductory psychology textbooks for college students, and other notable works, including ''
The Lucifer Effect ''The Lucifer Effect: Understanding How Good People Turn Evil'' is a 2007 book which includes professor Philip Zimbardo's first detailed, written account of the events surrounding the 1971 Stanford Prison Experiment (SPE) — a prison simulation ...
'', ''The Time Paradox'', and ''The Time Cure''. He is also the founder and president of the Heroic Imagination Project.


Early life

Zimbardo was born in
New York City New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the L ...
on March 23, 1933, to a family of Italian immigrants from
Cammarata Cammarata is a '' comune'' (municipality) in the Province of Agrigento in the Italian region Sicily, located about southeast of Palermo and about north of Agrigento on the eponymous mountain, which has an elevation above sea level in a territ ...
in
Sicily (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...
. Early in life he experienced discrimination and prejudice, growing up poor on
welfare Welfare, or commonly social welfare, is a type of government support intended to ensure that members of a society can meet basic human needs such as food and shelter. Social security may either be synonymous with welfare, or refer specifical ...
and being Italian. He was often mistaken for other races and ethnicities such as
Jewish Jews ( he, יְהוּדִים, , ) or Jewish people are an ethnoreligious group and nation originating from the Israelites Israelite origins and kingdom: "The first act in the long drama of Jewish history is the age of the Israelites""The ...
, Puerto Rican or
black Black is a color which results from the absence or complete absorption of visible light. It is an achromatic color, without hue, like white and grey. It is often used symbolically or figuratively to represent darkness. Black and white ha ...
. Zimbardo has said these experiences early in life triggered his curiosity about people's behavior, and later influenced his research in school. He completed his B.A. with a triple major in
psychology Psychology is the science, scientific study of mind and behavior. Psychology includes the study of consciousness, conscious and Unconscious mind, unconscious phenomena, including feelings and thoughts. It is an academic discipline of immens ...
,
sociology Sociology is a social science that focuses on society, human social behavior, patterns of social relationships, social interaction, and aspects of culture associated with everyday life. It uses various methods of empirical investigation an ...
, and
anthropology Anthropology is the scientific study of humanity, concerned with human behavior, human biology, cultures, societies, and linguistics, in both the present and past, including past human species. Social anthropology studies patterns of be ...
from
Brooklyn College , mottoeng = Nothing without great effort , established = , parent = CUNY , type = Public university , endowment = $98.0 million (2019) , budget = $123.96 m ...
in 1954, where he graduated '' summa cum laude''. He completed his M.S. (1955) and Ph.D. (1959) in psychology from
Yale University Yale University is a private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the third-oldest institution of higher education in the United States and among the most prestigious in the w ...
, where
Neal E. Miller Neal Elgar Miller (August 3, 1909 – March 23, 2002) was an American experimental psychologist. Described as an energetic man with a variety of interests, including physics, biology and writing, Miller entered the field of psychology to pursue ...
was his advisor. While at Yale, he married fellow graduate student Rose Abdelnour; they had a son in 1962 and divorced in 1971. He taught at Yale from 1959 to 1960. From 1960 to 1967, he was a professor of psychology at
New York University College of Arts & Science The New York University College of Arts & Science (CAS) is the primary liberal arts college of New York University (NYU). The school is located near Gould Plaza next to the Courant Institute of Mathematical Sciences and the Stern School of Busin ...
. From 1967 to 1968, he taught at
Columbia University Columbia University (also known as Columbia, and officially as Columbia University in the City of New York) is a private research university in New York City. Established in 1754 as King's College on the grounds of Trinity Church in Manhatt ...
. He joined the faculty at
Stanford University Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is conside ...
in 1968.


Stanford prison study


Background

In 1971, Zimbardo accepted a tenured position as professor of psychology at Stanford University. With a government grant from the U.S. Office of Naval Research, he conducted the Stanford prison study in which male college students were selected (from an applicant pool of 75). After a mental health screening, the remaining men were randomly assigned to be "prisoners" or "guards" in a mock prison located in the basement of the psychology building at Stanford. Prisoners were confined to a 6' x 9' cell with black steel-barred doors. The only furniture in each cell was a cot. Solitary confinement was a small unlit closet. Zimbardo's goal for the Stanford Prison study was to assess the psychological effect on a (randomly assigned) student of becoming a prisoner or prison guard. A 1997 article from the Stanford News Service described the experiment's goals in more detail:
Zimbardo's primary reason for conducting the experiment was to focus on the power of roles, rules, symbols, group identity and situational validation of behavior that generally would repulse ordinary individuals. "I had been conducting research for some years on deindividuation,
vandalism Vandalism is the action involving deliberate destruction of or damage to public or private property. The term includes property damage, such as graffiti and defacement directed towards any property without permission of the owner. The ter ...
and dehumanization that illustrated the ease with which ordinary people could be led to engage in anti-social acts by putting them in situations where they felt anonymous, or they could perceive of others in ways that made them less than human, as enemies or objects," Zimbardo told the Toronto symposium in the summer of 1996.


Experiment

Zimbardo himself took part in the study, playing the role of "prison superintendent" who could mediate disputes between guards and prisoners. He instructed guards to find ways to dominate the prisoners, not with physical violence, but with other tactics, verging on torture, such as sleep deprivation and punishment with solitary confinement. Later in the experiment, as some guards became more aggressive, taking away prisoners' cots (so that they had to sleep on the floor), and forcing them to use buckets kept in their cells as toilets, and then refusing permission to empty the buckets, neither the other guards nor Zimbardo himself intervened. Knowing that their actions were observed but not rebuked, guards considered that they had implicit approval for such actions. In later interviews, several guards told interviewers that they knew what Zimbardo wanted to have happen, and they did their best to make that happen. Less than two full days into the study, one inmate pretended to suffer from depression, uncontrolled rage and other mental dysfunctions. The prisoner was eventually released after screaming and acting in an unstable manner in front of the other inmates. He later revealed that he faked this "breakdown" to get out of the study early to focus on school. This prisoner was replaced with one of the alternates.


Results

By the end of the study, the guards had won complete control over all of their prisoners and were using their authority to its greatest extent. One prisoner had even gone as far as to go on a hunger strike. When he refused to eat, the guards put him into solitary confinement for three hours (even though their own rules stated the limit that a prisoner could be in solitary confinement was only one hour). Instead of the other prisoners looking at this inmate as a hero and following along in his strike, they chanted together that he was a bad prisoner and a troublemaker. Prisoners and guards had rapidly adapted to their roles, stepping beyond the boundaries of what had been predicted and leading to dangerous and psychologically damaging situations. Zimbardo himself started to give in to the roles of the situation. He had to be shown the reality of the study by
Christina Maslach Christina Maslach (born January 21, 1946) is an American social psychologist and professor emerita of psychology at the University of California, Berkeley, known for her research on occupational burnout. She is a co-author of the Maslach Bur ...
, his girlfriend and future wife, who had just received her doctorate in psychology. Zimbardo reflects that the message from the study is that "situations can have a more powerful influence over our behaviour than most people appreciate, and few people recognize hat" At the end of the study, after all the prisoners had been released and the guards let go, everyone was brought back into the same room for evaluation and to be able to get their feelings out in the open towards one another. Ethical concerns surrounding the study often draw comparisons to the Milgram experiment, which was conducted in 1961 at
Yale University Yale University is a private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the third-oldest institution of higher education in the United States and among the most prestigious in the w ...
by Stanley Milgram, Zimbardo's former high school friend. More recently, Thibault Le Texier of the University of Nice has examined the archives of the experiment, including videos, recordings, and Zimbardo's handwritten notes, and argued that "The guards knew what results the experiment was supposed to produce ... Far from reacting spontaneously to this pathogenic social environment, the guards were given clear instructions for how to create it ... The experimenters intervened directly in the experiment, either to give precise instructions, to recall the purposes of the experiment, or to set a general direction ...In order to get their full participation, Zimbardo intended to make the guards believe that they were his research assistants.". Since his original publication in French, Le Texier's accusations have been taken up by science communicators in the United States. In his book ''Humankind - a hopeful history'' (2020) historian Rutger Bregman points out the charge that the whole experiment was faked and fraudulous; Bregman argued this experiment is often used as an example to show people easily succumb to evil behavior, but Zimbardo has been less than candid about the fact that he told the guards to act the way they did. More recently, an APA psychology article reviewed this work in detail and concluded that Zimbardo encouraged the guards to act the way they did, so rather than this behavior appearing on its own, it was generated by Zimbardo.


Prisoner abuse at Abu Ghraib Prison

Zimbardo reflects on the dramatic visual similarities between the behavior of the participants in the
Stanford prison experiment The Stanford prison experiment (SPE) was a psychological experiment conducted in the summer of 1971. It was a two-week simulation of a prison environment that examined the effects of situational variables on participants' reactions and beh ...
, and the prisoner abuse at Abu Ghraib. He did not accept the Chairman of the Joint Chiefs of Staff, General Myers', claim that the events were due to a few rogue soldiers and that it did not reflect on the military. Instead he looked at the situation the soldiers were in and considered the possibility that this situation might have induced the behavior that they displayed. He began with the assumption that the abusers were not "bad apples" and were in a situation like that of the Stanford prison study, where physically and psychologically healthy people were behaving sadistically and brutalizing prisoners. Zimbardo became absorbed in trying to understand who these people were, asking the question "are they inexplicable, can we not understand them". This led him to write the book ''The Lucifer Effect''.


''The Lucifer Effect''

''The Lucifer Effect'' was written in response to his findings in the Stanford Prison Experiment. Zimbardo believes that personality characteristics could play a role in how violent or submissive actions are manifested. In the book, Zimbardo says that humans cannot be defined as good or evil because we have the ability to act as both especially at the hand of the situation. Examples include the events that occurred at the Abu Ghraib Detention Center, in which the defense team—including Gary Myers—argued that it was not the prison guards and interrogators that were at fault for the physical and mental abuse of detainees but the Bush administration policies themselves. According to Zimbardo, "Good people can be induced, seduced, and initiated into behaving in evil ways. They can also be led to act in irrational, stupid, self-destructive, antisocial, and mindless ways when they are immersed in 'total situations' that impact human nature in ways that challenge our sense of the stability and consistency of individual personality, of character, and of morality."(Zimbardo, The Lucifer Effect, p. 211) In '' The Journal of the American Medical Association'', There are seven social processes that grease "the slippery slope of evil": * Mindlessly taking the first small step * Dehumanization of others * De-individuation of self (anonymity) * Diffusion of personal responsibility * Blind obedience to authority * Uncritical conformity to group norms * Passive tolerance of evil through inaction or indifference


Time

In 2008, Zimbardo published his work with John Boyd about the Time Perspective Theory and the Zimbardo Time Perspective Inventory (ZTPI) in ''The Time Paradox: The New Psychology of Time That Will Change Your Life''. In 2009, he met Richard Sword and started collaborating to turn the Time Perspective Theory into a clinical therapy, beginning a four-year long pilot study and establishing time perspective therapy. In 2009, Zimbardo did his Ted Talk "The Psychology of Time" about the Time Perspective Theory. According to this Ted Talk, there are six kinds of different Time Perspectives which are Past Positive TP (Time Perspective), Past Negative TP, Present Hedonism TP, Present Fatalism TP, Future Life Goal-Oriented TP and Future Transcendental TP. In 2012, Zimbardo, Richard Sword, and his wife Rosemary authored a book called ''The Time Cure.'' Time Perspective therapy bears similarities to Pause Button Therapy, developed by psychotherapist Martin Shirran, whom Zimbardo corresponded with and met at the first International Time Perspective Conference at the University of Coimbra, Portugal. Zimbardo wrote the foreword to the second edition of Shirran's book on the subject.


Heroic Imagination Project

As of 2014 Zimbardo is heading a movement for everyday heroism as the founder and director of the Heroic Imagination Project (HIP), a non-profit organization dedicated to promoting heroism in everyday life. The project is currently collecting data from former American gang members and individuals with former ties to terrorism for comparison, in an attempt to better understand how individuals change violent behavior. This research portion of the project is co-headed by Rony Berger, Yotam Heineburg, and Leonard Beckum. He published an article contrasting heroism and altruism in 2011 with Zeno Franco and Kathy Blau in the ''Review of General Psychology''.


Social intensity syndrome (SIS)

In 2008, Zimbardo began working with Sarah Brunskill and Anthony Ferreras on a new theory called the social intensity syndrome (SIS). SIS is a new term coined to describe and normalize the effects military culture has on the socialization of both active soldiers and veterans. Zimbardo and Brunskill presented the new theory and a preliminary factor analysis of it accompanying survey at the Western Psychological Association in 2013. Brunskill finished the data collection in December 2013. Through an exploratory component factor analysis, confirmatory factor analysis, internal consistency and validity tests demonstrated that SIS was a reliable and valid construct of measuring military socialization.


Other endeavors

After the prison experiment, Zimbardo decided to look for ways he could use psychology to help people; this led to the founding of The Shyness Clinic in Menlo Park, California, which treats shy behavior in adults and children. Zimbardo's research on shyness resulted in several bestselling books on the topic. Other subjects he has researched include mind control and
cult In modern English, ''cult'' is usually a pejorative term for a social group that is defined by its unusual religious, spiritual, or philosophical beliefs and rituals, or its common interest in a particular personality, object, or goal. Thi ...
ic behavior.What messages are behind today's cults?
, APA Monitor, May 1997
Zimbardo is the co-author of an introductory Psychology textbook entitled ''Psychology and Life'', which is used in many American undergraduate psychology courses. He also hosted a PBS TV series titled ''
Discovering Psychology ''Discovering Psychology'' is a PBS documentary on psychology presented by Philip Zimbardo, for which he received the Carl Sagan Award for Public Understanding of Science The Carl Sagan Award for Public Understanding of Science is an award pre ...
'' which is used in many college telecourses. In 2004, Zimbardo testified for the defense in the court martial of Sgt. Ivan "Chip" Frederick, a guard at Abu Ghraib prison. He argued that Frederick's sentence should be lessened due to mitigating circumstances, explaining that few individuals can resist the powerful situational pressures of a prison, particularly without proper training and supervision. The judge apparently disregarded Zimbardo's testimony, and gave Frederick the maximum 8-year sentence. Zimbardo drew on the knowledge he gained from his participation in the Frederick case to write a new book entitled ''The Lucifer Effect: Understanding How Good People Turn Evil'', about the connections between Abu Ghraib and the prison experiments. Zimbardo's writing appeared in Greater Good Magazine, published by the Greater Good Science Center of the
University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant un ...
. Zimbardo's contributions include the interpretation of scientific research into the roots of compassion, altruism, and peaceful human relationships. His most recent article with Greater Good magazine is entitled: "The Banality of Heroism", which examines how ordinary people can become everyday heroes. In February 2010, Zimbardo was a guest presenter at the Science of a Meaningful Life seminar: Goodness, Evil, and Everyday Heroism, along with Greater Good Science Center Executive Director
Dacher Keltner Dacher Joseph Keltner is a Mexican-born American professor of psychology at University of California, Berkeley, who directs the Berkeley Social Interaction Lab. He is also the founder and faculty director of the Greater Good Science Center, hos ...
. Zimbardo, who officially retired in 2003, gave his final "Exploring Human Nature" lecture on March 7, 2007, on the Stanford campus, bringing his teaching career of 50 years to a close. David Spiegel, professor of
psychiatry Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial p ...
at the Stanford University School of Medicine, called Zimbardo "a legendary teacher", saying that "he has changed the way we think about social influences." Zimbardo has made appearances on American TV, such as The Daily Show with Jon Stewart on March 29, 2007,
The Colbert Report ''The Colbert Report'' ( ) is an American late-night talk and news satire television program hosted by Stephen Colbert that aired four days a week on Comedy Central from October 17, 2005, to December 18, 2014, for 1,447 episodes. The show fo ...
on February 11, 2008 and
Dr. Phil Phillip Calvin McGraw (born September 1, 1950), better known as Dr. Phil, is an American television personality and author best known for hosting the talk show '' Dr. Phil''. He holds a doctorate in clinical psychology, though he ceased rene ...
on October 25, 2010. Zimbardo serves as advisor to the anti-bullying organization
Bystander Revolution Bystander Revolution is an anti-bullying organization founded in 2014 by billionaire and author MacKenzie Scott, which offers advice about simple things individuals can do to defuse bullying. Its website is an online resource that includes hund ...
and appears in the organization's videos to explain the
bystander effect The bystander effect, or bystander apathy, is a social psychological theory that states that individuals are less likely to offer help to a victim when there are other people present. First proposed in 1964, much research, mostly in the lab, has f ...
and discuss the evil of inaction. Since 2003, Zimbardo has been active in charitable and economic work in rural Sicily through the Zimbardo-Luczo Fund with
Steve Luczo Stephen J. "Steve" Luczo (born February 28, 1957) is the chairman of the board at Seagate. In January 2009, Luczo, Seagate's chairman, was appointed president and chief executive officer, returning him to the role he held at Seagate from 1998 ...
and the local director , which provides scholarships for academically gifted students from Corleone and Cammarata. In 2015, Zimbardo co-authored a book "Man (Dis)connected: How Technology Has Sabotaged What It Means To Be Male", which collected research to support a thesis that males are increasingly disconnected from society. He argues that a lack of two-parent households and female-oriented schooling have made it more attractive to live virtually, risking video game addiction or pornography addiction.


Recognition

In 2012, Zimbardo received the American Psychological Foundation Gold Medal for Lifetime Achievement in the Science of Psychology. In 2011, he received an honorary doctorate degree from SWPS University in Warsaw. In 2003, Zimbardo and University of Rome La Sapienza scholars Gian Vittorio Caprara, and Claudio Barbaranelli were awarded the sarcastic Ig Nobel Award for Psychology for their report "Politicians' Uniquely Simple Personalities".


Works

* Influencing attitude and changing behavior: A basic introduction to relevant methodology, theory, and applications (Topics in social psychology), Addison Wesley, 1969 * The Cognitive Control of Motivation. Glenview, IL: Scott, Foresman, 1969 * Stanford prison experiment: A simulation study of the psychology of imprisonment, Philip G. Zimbardo, Inc., 1972 * Influencing Attitudes and Changing Behavior. Reading, MA: Addison Wesley Publishing Co., 1969, * Canvassing for Peace: A Manual for Volunteers. Ann Arbor, MI: Society for the Psychological Study of Social Issues, 1970, ISBN * Influencing Attitudes and Changing Behavior (2nd ed.). Reading, MA: Addison Wesley., 1977, ISBN * ''Psychology and You,'' with David Dempsey (1978). * Shyness: What It Is, What to Do About It, Addison Wesley, 1990, * The Psychology of Attitude Change and Social Influence. New York: McGraw-Hill, 1991, * Psychology (3rd Edition), Reading, MA: Addison Wesley Publishing Co., 1999, * The Shy Child : Overcoming and Preventing Shyness from Infancy to Adulthood, Malor Books, 1999, * Violence Workers: Police Torturers and Murderers Reconstruct Brazilian Atrocities. Berkeley, CA: University of California Press, 2002, * Psychology - Core Concepts, 5/e, Allyn & Bacon Publishing, 2005, * Psychology And Life, 17/e, Allyn & Bacon Publishing, 2005, * The Lucifer Effect: Understanding How Good People Turn Evil,
Random House Random House is an American book publisher and the largest general-interest paperback publisher in the world. The company has several independently managed subsidiaries around the world. It is part of Penguin Random House, which is owned by Germ ...
, New York, 2007, * The Time Paradox: The New Psychology of Time That Will Change Your Life,
Simon & Schuster Simon & Schuster () is an American publishing company and a subsidiary of Paramount Global. It was founded in New York City on January 2, 1924 by Richard L. Simon and M. Lincoln Schuster. As of 2016, Simon & Schuster was the third largest publi ...
, New York, 2008, * The Journey from the Bronx to Stanford to Abu Ghraib, pp. 85–104 in "Journeys in Social Psychology: Looking Back to Inspire the Future", edited by Robert Levine, et al., CRC Press, 2008. * Salvatore Cianciabella (prefazione di Philip Zimbardo, nota introduttiva di Liliana De Curtis). Siamo uomini e caporali. Psicologia della dis-obbedienza. Franco Angeli, 2014.
siamouominiecaporali.it
* Maschi in difficoltà, Zimbardo, Philip, Coulombe, Nikita D., Cianciabella, Salvatore (a cura di), FrancoAngeli Editore, 2017. * Man (Dis)connected, Zimbardo, Philip, Coulombe, Nikita D., Rider/
Ebury Publishing Ebury Publishing is a division of Penguin Random House, and is a publisher of general non-fiction books in the UK. Ebury was founded in 1961 as a division of Nat Mags and was originally located on Ebury Street in London. It was sold to Cent ...
, United Kingdom, 2015, * Man Interrupted: Why Young Men are Struggling & What We Can Do About It. Philip Zimbardo, Nikita Coulombe; Conari Press, 2016.


See also

* Human experimentation in the United States * List of social psychologists *
Banality of evil ''Eichmann in Jerusalem: A Report on the Banality of Evil'' is a 1963 book by political thinker Hannah Arendt. Arendt, a Jew who fled Germany during Adolf Hitler's rise to power, reported on the trial of Adolf Eichmann, one of the major organizers ...


References


External links

*
The Heroic Imagination Project

Philip G. Zimbardo Papers (Stanford University Archives)
* * * *
Philip Zimbardo on the Lucifer Effect, in two parts

"Critical Situations: The Evolution of a Situational Psychologist - A Conversation with Philip Zimbardo"
, ''Ideas Roadshow'', 2016 {{DEFAULTSORT:Zimbardo, Philip 1933 births American people of Italian descent American social psychologists Brooklyn College alumni Crowd psychologists Living people New York University faculty Presidents of the American Psychological Association Stanford University Department of Psychology faculty Yale Graduate School of Arts and Sciences alumni