A Practical Guide to Better Work

Master Your Mental Workload

This site helps you understand and reduce cognitive overload in everyday work. Discover practical tools to prevent burnout, protect your focus, and simplify chaotic tasks.

Try the Calculators How It Works

Estimate Your Cognitive Load

Enter a task's duration, complexity, and how familiar you are with it to get a Cognitive Friction Index and see whether the work is sustainable in one sitting.

Measure Your Focus

See how session length, interruptions, and motivation combine into an Attention Focus Score — and why scattered meetings cost more than the minutes they take.

Classify Task Complexity

Model a workflow's steps, decision points, and automation to find where branching — not step count — quietly turns a procedure into an error-prone puzzle.

What this site is

Cognitive Systems Lab is a small, independent educational publication about cognitive load at work — the mental cost of the tasks, tools, and schedules we deal with every day. It exists because most productivity advice measures output (tickets closed, hours logged) while ignoring the cognitive price paid to produce it. We try to make that price visible.

Two things make this site different from the many "productivity" pages covering similar ground:

The tools are fully transparent. Every calculator publishes its exact formula, its weights, and its classification thresholds on the page. Nothing is hidden behind a "smart algorithm." If you disagree with a weight, you can see precisely what to disagree with.
We separate evidence from opinion. Where a claim comes from peer-reviewed research, we cite it and link to the primary source. Where a number is our own design choice, we say so plainly. You will never find an invented figure dressed up as science here.

Three free tools, no sign-up, nothing stored

All three estimators run entirely in your browser. No account, no tracking of your inputs, and no data sent to a server — when you close the tab, the numbers are gone.

Cognitive Load Estimator — for deciding whether a single task is sustainable or needs restructuring.
Attention Focus Meter — for diagnosing how a schedule of interruptions erodes deep work.
Task Complexity Classifier — for finding the decision points where a workflow is most likely to break.

New here? Start with How It Works to understand why each input is weighted the way it is, or read the full Methodology for the models, the glossary, and the honesty tiers we attach to every claim.

Grounded in published research — and honest about its limits

The direction of every tool is anchored in well-established work in cognitive psychology and human factors: the limits of working memory (Miller, 1956; Baddeley & Hitch, 1974), Cognitive Load Theory (Sweller, 1988), and the real cost of interruptions and task switching (Leroy, 2009; Mark et al., 2008). We summarise these in plain language and link to the original papers so you can check them yourself.

What we do not claim is clinical precision. These are educational heuristics for comparing tasks and spotting risk — not psychometric instruments, and never a diagnosis of any person or medical condition. That boundary is stated on every tool.

Miller, G. A. (1956). The magical number seven, plus or minus two. Psychological Review, 63(2), 81–97. doi:10.1037/h0043158
Sweller, J. (1988). Cognitive load during problem solving. Cognitive Science, 12(2), 257–285. doi:10.1207/s15516709cog1202_4
Leroy, S. (2009). Why is it so hard to do my work? Organizational Behavior and Human Decision Processes, 109(2), 168–181. doi:10.1016/j.obhdp.2009.04.002