How to use
What this site does
It measures reaction time, number memory, visual memory and typing speed. When you finish, it shows where you stand among this site's visitors.
Steps
- Pick a test on the home page.
- Read how it is measured, then start.
- When it ends, you see your score and your place in the visitor distribution.
- Share it or post it to the ranking if you want. If you do not post, nothing goes to the ranking service.
- Try again or move on to another test.
What it cannot do
- It is not a medical test and does not diagnose cognitive function.
- There is no norm by age or population. You are compared with this site's visitors only.
- A test with fewer than 30 scores shows no position, only a note that the sample is small.
- Reaction time depends on screen, input device and browser, so do not compare it directly with numbers from other devices.
- There is no login, so past scores cannot be loaded back.