Strip extraneous cognitive load from learning materials

Remove every element in your environment or materials that consumes attention without teaching anything.

Why it works

Cognitive load theory, which builds on Baddeley’s model, distinguishes intrinsic load (inherent task complexity), germane load (the effort of forming new schemas), and extraneous load (load caused by poor design, clutter, or distraction). Working memory is a fixed resource, so load spent on irrelevant processing directly reduces capacity for learning. Reducing extraneous load reallocates that capacity to actual schema formation.

How to do it

1. Remove decorative elements from study materials — graphs without labels, bold text without reason, ambient noise.
2. Use consistent notation and format across related materials so translation effort disappears.
3. Study in a predictable environment so orientation does not eat into attention.

Evidence

Cognitive load theory has generated a large body of instructional-design research showing that reducing extraneous elements improves learning, often substantially. The redundancy effect and the coherence effect are two well-documented examples. (observational)

Much of the evidence is from controlled instructional settings; real-world reduction of extraneous load involves tradeoffs between engagement and simplicity.

Sources

• Sweller, van Merriënboer & Paas (1998), "Cognitive architecture and instructional design", Educational Psychology Review

Common mistake

Studying in "productive noise" settings (cafés, TV in background) and attributing the subjective sense of focus to the ambient activity, while background processing continuously drains working memory.