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IB DP Psychology — Sociocultural Approach | SL & HL | Paper 1
🎯 Learning Intentions By the end of this note, you will be able to:
- Define social identity, in-group, out-group, and social categorisation using IB-aligned terminology.
- Explain the three-stage process of Social Identity Theory: social categorisation, social identification, and social comparison.
- Describe how in-group favouritism and out-group discrimination emerge from the need for positive self-esteem.
- Evaluate research evidence for Social Identity Theory using supporting and opposing studies in ACAS format.
- Apply Social Identity Theory concepts to a real-world case study from the sociocultural perspective.
- Discuss the extent to which Social Identity Theory provides a complete explanation of intergroup conflict and prejudice.
- Analyse Social Identity Theory using relevant concept areas: Bias, Causality, Perspective, and Responsibility.
Introduction & Context
Think about the last time you felt a surge of pride when your school's sports team won a match — even if you were sitting in the stands and had nothing to do with the victory. Or consider how quickly people divide into "us" and "them" when assigned to competing groups, even over something as trivial as a coin toss. These everyday moments reveal something profound: human beings do not just have a personal identity built from their individual traits and experiences. They also carry a social identity — a sense of self that is constructed from the groups they belong to.
This tendency to define ourselves through group membership is so automatic and so powerful that it shapes how we perceive others, how we treat people outside our groups, and even how we feel about ourselves on a given day. Social psychologists Henri Tajfel and John Turner noticed this pattern and set out to explain it systematically. Their answer — Social Identity Theory — became one of the most influential frameworks in social psychology, offering an explanation for everything from school cliques to national conflict.
🔍 Analogy — The Football Scarf Imagine two strangers sitting next to each other on a train. They have never met, share no personal history, and know nothing about each other. Then one of them notices the other is wearing the scarf of their rival football club. Instantly, something shifts — a subtle coolness, a guarded posture, perhaps a quiet sense of superiority. Neither person has done anything wrong. But the scarf has sorted them into categories: "us" and "them." Social Identity Theory explains exactly why this happens — and why it matters far beyond football.
Core Concepts
To understand Social Identity Theory, we need to begin with a deceptively simple question: who are you? Most people answer this by listing personal characteristics — their name, their personality, their interests. But Tajfel and Turner argued that a significant part of the answer lies not in who you are as an individual, but in which groups you belong to. This insight forms the foundation of the theory.
📖 Key Definition — Social Identity Social identity refers to the part of an individual's self-concept that is derived from their membership in social groups, together with the value and emotional significance attached to that membership (Tajfel, 1981).
Social identity is