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---
title: "Social Identity Theory"
type: concept
tags: []
sources: [academic-psychologist]
last_updated: 2026-04-25
---
# Social Identity Theory
## Aliases
- Social Identity Theory (Tajfel)
- SIT
- Tajfel's Social Identity Theory
## Definition
Tajfel 社会认同理论——个体通过群体 membership 获得自我概念,群体内/外动态In-group/Out-group深刻影响态度和行为。
## Core Concepts
### Social Identity社会认同
个体自我概念的一部分,来源于群体成员身份。
- **个人认同**Personal Identity个体独特属性
- **社会认同**Social Identity群体成员共享的属性
### In-group vs. Out-group
- **In-group内群体**:个体认同的群体,产生忠诚和偏好
- **Out-group外群体**:个体不认同的群体,容易被刻板化
- **In-group Bias内群体偏好**:系统性地优待内群体成员
- **Out-group Homogeneity外群体同质化**:认为外群体成员比实际更相似
### Minimal Group Paradigm最简群体范式
Tajfel 实验证明:即使群体划分完全任意(无实质差异),人们仍会表现出内群体偏好和外群体歧视——证明社会认同的内生驱动力量。
### Social Categorization社会分类
人们自然地将世界分为"我们"和"他们",这一过程是自动化的,影响注意力和判断。
## Application in Character Design
Psychologist Agent 使用此框架分析群体互动中的身份政治、偏见形成和群体极化,帮助设计真实的社会动态。
## Connection to Wiki
- Source: [[academic-psychologist]]