Understanding your Human Index

The Human Index is one number between 0 and 100 that sits on top of every test on the site. Here is exactly what it is.

How it is built

For each test you complete, your best run is converted to a percentile against that test’s reference sample. A percentile of 70 means you scored better than 70% of that sample. The Human Index is then the plain average of those percentiles across all the tests you have finished.

That is the whole calculation. There is no weighting, no secret formula, no IQ conversion. If you have done three tests and scored at the 40th, 60th and 80th percentiles, your Human Index is 60.

Why it needs several tests

With one test done, your Human Index is just that test’s percentile wearing a different hat. It only becomes meaningful as you add tests from different domains - attention, working memory, motor speed, timing, processing speed and so on. A high average across ten varied tests is a genuinely broad result; a high score on one is not.

The radar chart on your Human Index page shows this directly. Most people are not uniform - they have a couple of strong spikes and a couple of dips. That shape is more interesting than the single number.

What it is not

It is not a clinical or diagnostic measure. Every score here is affected by your hardware, your environment, your sleep, your mood and how much you have practised. The reference samples are baselines seeded from published norms rather than live data from other users.

Treat the Human Index the way you would treat a personal best in the gym: useful for tracking your own trajectory, not for ranking yourself against a stranger.

Why some tests do not count

Some tests measure a style rather than an ability - a risk-taking task, for example, where a cautious player and an aggressive one are different, not better and worse. Feeding that kind of percentile into an “ability” score would be nonsense. Tests like that are shown with their own percentile but left out of the Human Index entirely, so a different temperament is never treated as a deficit.

Start building yours.