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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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Not all intergroup interactions lead to negative outcomes. Sometimes, being in a group situation can improve performance. Social facilitation occurs when an individual performs better when an audience is watching than when the individual performs the behavior alone. This typically occurs when people are performing a task for which they are skilled.
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Psychology explores human behavior and mental processes through various lenses, each offering unique insights. This overview examines key subfields, including biopsychology, evolutionary, developmental, personality, and social psychology, highlighting their approaches and contributions to understanding complex human behaviors.
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Related Experiment Video

Updated: Sep 12, 2025

The HoneyComb Paradigm for Research on Collective Human Behavior
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The Psychology of Crowd Behavior.

John Drury1

  • 1School of Psychology, University of Sussex, Brighton, United Kingdom;

Annual Review of Psychology
|August 5, 2025
PubMed
Summary

The social identity approach explains crowd behavior, examining density, emotion, and emergencies. This research provides practical applications for crowd psychology and emergency response, highlighting its theoretical and applied value.

Area of Science:

  • Social Psychology
  • Crowd Behavior Dynamics
  • Collective Action

Background:

  • The social identity approach to crowd behavior has seen significant growth over the past two decades.
  • Existing research provides a foundation for understanding crowd psychology.

Purpose of the Study:

  • To review and organize recent advancements in the social identity approach to crowd behavior.
  • To highlight the theoretical and practical implications of this research.

Main Methods:

  • Literature review and synthesis of recent quantitative and qualitative research.
  • Organization of findings into three thematic sections: crowd dynamics, emergency behavior, and psychological change.

Main Results:

  • Recent findings cover crowd density, heightened emotions, mass gathering health, and identity-strengthening events.
Keywords:
crowdsmass emergenciesmass gatheringsprotestsriotssocial identity

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  • Research on emergency behavior demonstrates the impact of crowd models on policy and practice.
  • New studies explore psychological changes in collective action, policing, and social influence.

    • Conclusions:

    • The social identity approach offers valuable theoretical insights into crowd behavior.
    • The research has demonstrated significant practical applications in areas such as emergency response and public order.
    • Continued research advances both the theory and practical utility of understanding crowd psychology.