Cognitive Load: Why Some Work Feels Heavy
Cognitive load: The demand a task places on working memory — split between what the material inherently requires and what the way it is presented adds on top.
Where the idea comes from
John Sweller developed cognitive load theory from the late 1980s in an educational context, distinguishing load intrinsic to the material from extraneous load added by how it is presented. The theory has been influential in instructional design and, like most influential theories, has been stretched well past its evidence in popular use.
How it shows up
- Simple work feeling exhausting when the setup is messy
- Needing several attempts to understand something explained badly
- Being fine with the task and defeated by the tooling around it
- Fatigue disproportionate to what was produced
Practical steps to try
- Reduce extraneous load first: fewer open windows, one document, decisions made in advance
- Split the work — writing and formatting are two tasks, and doing them at once costs more than doing them in sequence
- Build reusable structure so the same setup is not reconstructed daily
- Schedule demanding work when you personally have suitable energy and enough time
Where the popular version overreaches
Cognitive load theory comes from instructional design and is about learning materials. Applying it to every kind of tiredness at work is a stretch, and "reduce cognitive load" has become a phrase that means "make it simpler" with a scientific accent.
Common questions
- What is the difference between intrinsic and extraneous load?
- Intrinsic load comes from the material — a hard proof is hard. Extraneous load comes from how it is presented or arranged: bad formatting, scattered tooling, having to hold context the environment could have shown you. The second kind is the one you can remove.
Sources
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