LETTER SORT · 20 TRIALS
See a letter. Decide which group it belongs to before the timer runs out.
Classify 20 letters. Mistakes and timeouts count, then the game continues.
READY?
Press V for vowel or C for consonant. You have 2 seconds.
Keyboard: V for VOWEL · C for CONSONANT. Touch or mouse: tap a large labeled button.
HOW TO PLAY
Start the game and watch the single letter in the center.
Press V for A, E, I, O, or U. Press C for every other letter.
Finish all 20 standard trials, or keep a perfect endless streak as the deadline shrinks.
LETTER CLASSIFICATION
Each trial combines letter recognition, category recall, and a two-choice response. Standard mode balances ten vowels with ten consonants.
This is a recreational browser game, not a clinical assessment. Device latency, input method, attention, and practice can affect your result.
READ YOUR RESULT
Standard accuracy includes all 20 trials, including wrong answers and timeouts. Reaction-time averages use correct answers only.
For a useful personal comparison, replay on the same device and use the same input method.
QUESTIONS
This game uses A, E, I, O, and U as vowels. Every other English letter is treated as a consonant.
In standard mode, a timeout counts as an incorrect trial and the game continues. In endless mode, it ends the run.
The first letter allows 2 seconds. Each correct answer shortens the next deadline until it reaches 400 milliseconds.
Yes. Tap either large response button on mobile, or use V and C on a desktop keyboard.