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Updated: Jul 11, 2026

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Published on: September 28, 2018
Summary
Philip Zimbardo
Area of Science:
- Psychology
- Social Psychology
Background:
- Philip G. Zimbardo (1933-2024) was a prominent psychologist with a career spanning over five decades.
- His academic journey included triple majors at Brooklyn College and a PhD from Yale University.
- He held a long-standing faculty position at Stanford University, significantly contributing to psychological research.
Purpose of the Study:
- This article memorializes the life and extensive research contributions of Philip G. Zimbardo.
- It highlights his diverse research interests, from attitude change and deindividuation to time perspective and heroism.
- The abstract also touches upon his most cited works and his passion for psychology.
Main Methods:
- The article summarizes Zimbardo's research trajectory and key studies.
- It references his foundational work on concepts such as deindividuation, shyness, and time perspective.
- The Stanford Prison Experiment and the Zimbardo Time Perspective Inventory are noted as significant contributions.
Main Results:
- Zimbardo's research garnered over 72,000 citations, with significant recognition for his work on time perspective and "The Lucifer Effect."
- His studies explored the influence of situational factors and social roles on behavior, including the Stanford Prison Experiment.
- Later work focused on heroism and prosocial behaviors, leading to the establishment of the Heroic Imagination Project.
Conclusions:
- Philip Zimbardo was a influential psychologist known for his profound understanding of human nature.
- His research aimed to improve individual lives and the wider world through the application of psychological principles.
- He is remembered for his warmth, wit, and dedication to sharing his love for psychology.
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Milgram's Obedience to Authority
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Social Facilitation
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Deindividuation
Deindividuation is a form of social influence on an individual’s behavior such that the individual engages in unusual or non-normal behavior while in a group setting. Why? Because in these group settings, the individual no longer sees themselves as an individual anymore, disinhibiting their behavior and personal restraint.
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Erik Erikson's theory of psychosocial development outlines a series of stages through which individuals progress across the lifespan. Each stage involves a psychosocial conflict that significantly influences personal growth and well-being. Three key stages — intimacy versus isolation, generativity versus stagnation, and integrity versus despair — highlight the developmental challenges faced in adulthood.
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