Click circles as soon as possible.
The number indicated up-left of the screen means the number of your trials.
The system ignores your first trial to reduce possible delay caused by your warming up.
The distance to the target, diameter of the target, and the task completion time for each trial are listed below.
After several trials, copy and paste the results to your favorite spreadsheet application and analyse them.
For educational purpose, I don't show the necessary equations and how to analyse the results here.
Source code: fitts_law_test
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