You're staring at a math problem, you read the first line, start working through it — and by the time you reach the third step, you've forgotten what the question was asking. That's not a focus problem. That's working memory hitting its limit.

This TLDR guide breaks down one of the most practically useful ideas in cognitive psychology: how the mind's short-term workspace actually operates, why it overloads so easily, and what that means for anyone who studies, teaches, or just has to perform under pressure.

You'll get the full picture — from the Baddeley-Hitch model's four-part architecture (phonological loop, visuospatial sketchpad, central executive, and episodic buffer) to Miller's famous 7±2 capacity finding and Cowan's sharper revision of it. You'll see why cognitive load theory, developed by John Sweller, splits the demands on working memory into three types — intrinsic, extraneous, and germane — and why that distinction explains so much about how working memory affects learning. The final section turns the science into direct, usable strategies: how to structure notes, why multitasking is a myth, and how to reduce extraneous load when you're preparing for a test.

Written for high school and early college students, this guide is short by design. No padding, no jargon left unexplained. If you're prepping for AP Psychology or just want a cognitive load theory study guide you can finish in one sitting, this is it.

Pick it up and know the material before your next class.

• Define working memory and distinguish it from short-term memory and long-term memory
• Describe Baddeley and Hitch's multicomponent model and what each component does
• Explain the capacity and duration limits of working memory and the evidence behind them
• Distinguish intrinsic, extraneous, and germane cognitive load and identify each in real tasks
• Apply cognitive load theory to study strategies, classroom design, and everyday performance

1. 1. What Working Memory Is (and Isn't)
   Introduces working memory as the mind's active workspace and contrasts it with short-term and long-term memory.
2. 2. The Baddeley-Hitch Model: Four Parts of the Workspace
   Walks through the phonological loop, visuospatial sketchpad, central executive, and episodic buffer with examples.
3. 3. Capacity and Duration: Why You Can Only Hold So Much
   Covers Miller's 7±2, Cowan's 4±1, chunking, decay, and interference with classic experimental evidence.
4. 4. Cognitive Load Theory: Intrinsic, Extraneous, and Germane
   Introduces Sweller's three types of cognitive load and how each one taxes working memory differently.
5. 5. Applications: Studying, Teaching, and Everyday Performance
   Translates the science into concrete strategies for learning, instructional design, multitasking, and high-pressure tasks.