Reaction clicking
Set target timing and duration to become familiar with the interaction.
Practice mode · Separate feature
Repeat freely without affecting official tests or rankings.
Practice mode will let you choose duration, difficulty and repetitions. Practice results stay separate, never enter the leaderboard and never replace an official best score.
∞Unlimited · unranked
Practice library
Choose a practice activity
This page previews the interface. Practice history and saved results are not available yet.
Number grouping
Choose a digit length and repeat chunking exercises.
Color interference
Adjust colors and rounds to become familiar with Stroop rules.
Looking for an official measurement? Browse cognitive tests →