Social psychology explores how individuals' thoughts, feelings, and behaviours are influenced by the actual, imagined, or implied presence of others. In Edexcel A-Level Psychology, Topic 1 covers key areas such as obedience, prejudice, and group processes. You will study classic studies like Milgram's obedience experiment and Sherif's Robbers Cave, alongside contemporary research and real-world applications. Understanding social psychology is crucial because it explains phenomena like conformity in peer pressure, obedience to authority, and the roots of discrimination—issues that affect everyday life and society at large.

This topic is divided into two main sections: classic studies and contemporary debates. You'll examine how social psychologists have investigated obedience (e.g., Milgram, 1963) and prejudice (e.g., Sherif et al., 1954/1961). The contemporary debates focus on issues such as whether obedience is a product of disposition or situation, and how prejudice can be reduced through contact. Social psychology also links to other topics in the course, such as biological explanations of behaviour (e.g., the role of oxytocin in group bonding) and individual differences (e.g., authoritarian personality). Mastering this topic will help you critically evaluate research methods and ethical considerations, which are essential for your exams and beyond.

Why does social psychology matter? It provides insights into historical atrocities (e.g., the Holocaust) and modern issues like online echo chambers and political polarisation. By studying this topic, you'll develop a deeper understanding of human nature and the power of social situations. You'll also learn to apply psychological principles to improve intergroup relations and resist harmful social influences. For your A-Level, you'll need to recall key studies, evaluate their strengths and limitations, and discuss their implications for society. This foundation will serve you well in both exams and future studies in psychology.