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IB DP Psychology — Cognitive Approach | SL & HL | Paper 1
🎯 Learning Intentions By the end of this note, you will be able to:
- Define cognitive load, working memory, and long-term memory using IB-aligned terminology.
- Explain the three types of cognitive load — intrinsic, extraneous, and germane — and how they interact to affect learning.
- Describe the role of working memory limitations in shaping how humans process and retain information.
- Evaluate research evidence for Cognitive Load Theory using supporting and opposing studies in ACAS format.
- Apply Cognitive Load Theory to a real-world case study from the cognitive perspective.
- Discuss the extent to which Cognitive Load Theory provides a complete explanation of learning and memory performance.
- Analyse Cognitive Load Theory using relevant concept areas: Bias, Causality, Measurement, and Perspective.
Introduction & Context
Imagine you are trying to follow a recipe you have never cooked before while simultaneously listening to a podcast and responding to a text message. You find yourself re-reading the same instruction three times, losing track of which step you are on, and eventually burning the onions. Nothing about this scenario involves a lack of intelligence — it is simply a case of trying to do too much at once with a mental system that has real, measurable limits.
This everyday frustration points to something psychologists have studied carefully: the human mind does not process information like a computer with unlimited RAM. There is a bottleneck — a stage in thinking where only a small amount of information can be held and worked with at any given moment. When that bottleneck becomes overwhelmed, learning breaks down. Understanding why this happens, and what can be done about it, is the central concern of Cognitive Load Theory.
Developed by educational psychologist John Sweller in the late 1980s, Cognitive Load Theory draws on earlier models of memory — particularly Baddeley and Hitch's model of working memory — to explain why some learning tasks succeed and others fail. It has since become one of the most influential frameworks in educational psychology, shaping how teachers design lessons, how textbooks are written, and how digital learning environments are structured.
🧩 Analogy — The Desk and the Filing Cabinet Think of your mind as an office. Your working memory is the surface of your desk — it is where active thinking happens, but it is small. You can only spread out a few documents at a time before things start falling off the edges. Your long-term memory is the filing cabinet behind you — it holds an enormous amount of organised information that you can retrieve when needed. Cognitive Load Theory is essentially about what happens when you try to put too many documents on the desk at once: work slows down, errors increase, and learning suffers. The goal of good instruction is to keep the desk manageable.
Core Concepts
Before we can understand cognitive load itself, we need to understand the system it operates within. The starting point is a deceptively simple observation: not all mental effort is the same. Some thinking feels effortless — like recognising a friend's face or reading a familiar word. Other thinking feels laborious — like solving an unfamiliar maths problem or learning a new language. What explains this difference?
The answer lies in the architecture of human memory. Cognitive psychologists distinguish between a short-term, active processing system and a long-term storage system. These two systems interact constantly, but they have very different properties —