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IB DP Psychology — Sociocultural Approach | SL & HL | Paper 1 & Paper 2 (Human Relationships)
🎯 Learning Intentions By the end of this note, you will be able to:
- Define online disinhibition, echo chambers, and social identity in the context of social media using IB-aligned terminology.
- Explain how anonymity and reduced social cues on social media platforms contribute to disinhibited behaviour and group polarisation.
- Describe the role of algorithmic filtering in the formation and reinforcement of echo chambers online.
- Evaluate research evidence for social media's influence on group behaviour using supporting and opposing studies in ACAS format.
- Apply concepts of online disinhibition, echo chambers, and social identity to a real-world case study from the sociocultural perspective.
- Discuss the extent to which social media fundamentally changes group behaviour or merely amplifies pre-existing social tendencies.
- Analyse social media and group behaviour using relevant concept areas: Bias, Causality, Perspective, and Responsibility.
Introduction & Context
Imagine scrolling through your social media feed and noticing that almost every post you see seems to confirm what you already believe. Your friends share the same opinions, the articles recommended to you reinforce your existing views, and anyone who disagrees seems to exist in a completely different world. Now imagine that same feed during a political election, a public health crisis, or a social justice movement. The way people behave in these digital spaces — what they say, how aggressively they say it, and who they say it to — often looks quite different from how those same people would behave face-to-face.
This raises a genuinely fascinating psychological question: does social media change how people behave in groups, or does it simply give us a new lens through which to observe tendencies that have always existed? Psychologists studying the sociocultural approach have turned their attention to this question with increasing urgency, examining how the architecture of online platforms shapes group dynamics, reinforces in-group identities, and sometimes accelerates the very worst of human social behaviour.
To understand social media and group behaviour, we need to draw on several interconnected ideas: how anonymity reduces social constraints, how group identity becomes amplified in digital spaces, and how the design of platforms themselves can create self-reinforcing communities of belief. Each of these ideas connects to broader psychological theories about how humans behave when they are part of a group — and what happens when those groups move online.
🔍 Analogy — The One-Way Mirror Think of a social media platform like a room with one-way mirrors for walls. You can see everyone who agrees with you clearly — they are right there in the room with you. But the people who think differently are behind the mirror; you know they exist, but you cannot really see or hear them. Over time, the room feels like the whole world. The mirror does not create your beliefs, but it does make them feel more universal and more urgent than they might otherwise seem. This is the essence of what social media does to group behaviour.
Core Concepts
When people interact face-to-face, a complex web of social signals regulates their behaviour. Eye contact, tone of voice, facial expressions, and the physical presence of others all act as invisible guardrails — they remind us that our words have consequences and that others are watching. Now consider what happens when most of those signals disappear. You are sitting alone at a screen. The person you are responding to is not