How the reaction time leaderboard works
Each reaction test is five rounds, and your score is the average of the five, in milliseconds. Only your personal best counts, so one great game puts you on the board and a bad day never knocks you off it. Equal times share a rank.
Every score is checked by our server before it's saved. The server decides the random wait before each target, so the timing can't be predicted, and it throws out results that aren't humanly possible: anything under 100 ms is a false start, just as it is in Olympic sprinting.
How the cricket top 10 is ranked
The cricket batting game is one over of six balls, each faster than the last. Runs come first and wickets break ties, so 30/0 beats 30/1 and a perfect over is 36/0. As with the reaction test, the server plans every delivery and works out the score itself from your timing.
What counts as a fast reaction time?
Most adults average between 200 and 300 ms on an online test, and anything under 200 is genuinely quick. Age, sleep and even your screen all shift the number; the guides on reaction time by age and what affects reaction time explain why.
Get on the board
Play as a guest as often as you like. To put a score on the leaderboard, create a free account: just an email, a display name and a password. Your best score then gets its own page you can share with friends.