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Operant Conditioning
IB DP Psychology — Behavioural Approach | SL & HL | Paper 1
🎯 Learning Intentions By the end of this note, you will be able to:
- Define operant conditioning, reinforcement, punishment, and extinction using IB-aligned terminology.
- Explain the difference between positive and negative reinforcement, and why both increase behaviour.
- Distinguish between positive punishment, negative punishment, and reinforcement, clarifying why the terms are commonly confused.
- Describe the role of schedules of reinforcement in shaping the persistence and rate of behaviour.
- Evaluate research evidence for operant conditioning using supporting and opposing studies in ACAS format.
- Apply operant conditioning concepts to a real-world case study from the behavioural perspective.
- Discuss the extent to which operant conditioning provides a complete explanation of human behaviour.
- Analyse operant conditioning using relevant concept areas: Causality, Bias, Perspective, and Responsibility.
Introduction & Context
Think about the last time you received praise for doing something well — perhaps a teacher commended your essay, a coach celebrated your performance, or a friend reacted enthusiastically to something you said. Did you find yourself wanting to repeat that behaviour? Now think about the opposite: a time when something you did led to an unpleasant outcome. Did you hesitate before doing it again? These everyday experiences point toward a fundamental principle that psychologists have studied for over a century — that behaviour is shaped by its consequences.
This idea seems almost obvious when stated plainly, yet its implications are profound. If consequences reliably shape behaviour, then it should be possible to systematically increase or decrease almost any voluntary action by carefully controlling what follows it. This is the core insight of operant conditioning — a framework developed through decades of experimental work that has influenced everything from classroom teaching to animal training, parenting strategies, and even the design of social media platforms.
Unlike classical conditioning, which deals with reflexive, involuntary responses to stimuli, operant conditioning concerns itself with voluntary, goal-directed behaviour. The organism is not a passive recipient of stimuli — it is an active agent whose actions produce outcomes, and those outcomes feed back to influence future behaviour. Understanding how this feedback loop works is the central task of this topic.
🔁 Analogy — The Vending Machine Imagine a vending machine. You press a