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MENTAL MODEL · M4738

Weapons Effect

Weapons Effect
BehaviorHigh supportSocial Psychology
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Updated 2026-08-02

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INTRODUCTION

English translation pending.

CORE DEFINITION

First demonstrated by Leonard Berkowitz and Anthony LePage, the weapons effect shows that the presence of a weapon, even when unused, can increase aggressive behavior. In their experiment, angered participants who saw a rifle and revolver on a table delivered more intense shocks than those who saw badminton equipment. The effect is explained through priming: weapons automatically activate aggressive concepts and physiological arousal. Key qualification: later replications produced smaller and less consistent effects, so the effect size is debated even though the priming mechanism is well established.

SCAFFOLDING EFFECT

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- Audit the environment: list the objects in a space and the behavior each one cues. - Remove aggressive cues: take weapons, countdowns, and hostile symbols out of cooperative settings. - Design for behavior: place objects that cue calm and care where conflict is likely.

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Objects associated with aggression automatically activate related concepts in memory, which then shape how ambiguous situations are interpreted. The activated concepts increase the readiness of aggressive responses and raise physiological arousal, so the same provocation produces a stronger reaction. Because the process is automatic, people usually do not notice that the object influenced them.

MINIMUM ACTION

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Weapons_effectZH · Explicit
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