Cognitive Scaffold

Preparing your thinking workspace

arrow_back_ios_new
MENTAL MODEL · M5868

Bystander Effect

Bystander Effect
BehaviorHigh supportSocial Psychology
Included
account_tree

Version 1.0.0 · Updated 2026-07-28

CORE DEFINITION

The bystander effect is a social psychological term that refers to the phenomenon where the presence of other people reduces the likelihood that an individual will help in an emergency situation. The probability of assistance is negatively correlated with the number of bystanders. In other words, the more bystanders there are, the lower the chance that any one of them will offer help.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

The bystander effect is a social psychological term that refers to the phenomenon where the presence of other people reduces the likelihood that an individual will help in an emergency situation. The probability of assistance is negatively correlated with the number of bystanders. In other words, the more bystanders there are, the lower the chance that any one of them will offer help.

anchor

Anchor fast decisions

In an emergency, the more bystanders present, the lower the probability that any specific individual will intervene, due to diffusion of responsibility and conformity (interpreting others' inaction as a signal that no intervention is needed).

MINIMUM ACTION

In progress 0/3

Practice this model in one real situation:

Check to track your progress (stored locally)
Learning progress0%
account_treeGenealogyexpand_more
menu_bookReferencesexpand_more

Source support: Explicit

  • link
    zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%97%81%E8%A7%82%E8%80%85%E6%95%88%E5%BA%94ZH · Explicit
    verified

RELATED MODELS

Related model

Johari Window

Proposed by psychologists Joseph Luft and Harry Ingham, it divides information in interpersonal interactions into four areas: Open Area (known to self/known to others), Blind Spot (unknown to self/known to others), Hidden Area (known to self/unknown to others), and Unknown Area (unknown to self/unknown to others).

arrow_forwardRelated model

Sayre's Law

Sayre’s law is a satirical adage about emotional intensity being disproportionate to the stakes, sometimes especially over small matters.

arrow_forwardRelated model

Negging

Negging ("to neg", meaning "negative feedback") is an act of emotional manipulation whereby a person makes a deliberate backhanded compliment or otherwise flirtatious remark to another person to undermine their confidence and attempt to engender in them a need for the manipulator's approval. The term was coined and prescribed by pickup artists.

arrow_forward