Where the term comes from
Formalised in cognitive load theory in educational psychology, and closely related to research on working memory limits.
Why it matters
It explains why holding fourteen competing priorities in your head feels harder than reading the same fourteen off a page. The items are identical; the load is not. This is the mechanism behind most of the benefit of writing things down.
The common mistake
Confusing high load with difficulty. Fourteen trivial open loops can impose more load than one hard task with a clear next step.
What it looks like in practice
Holding a shopping list in your head while driving is harder than reading the same list off your phone at the shop. Same items, same shop — the difference is entirely what your working memory is being asked to carry at once.
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Frequently asked questions
What is cognitive load?
Cognitive load is the total amount of working memory a task demands at one time, including both the task itself and any information you are holding in mind alongside it.
What's the most common mistake with cognitive load?
Confusing high load with difficulty. Fourteen trivial open loops can impose more load than one hard task with a clear next step.