Perceptual speed

Fast letter-pair matching built to simulate GIA-style pressure.

Module guide

Perceptual Speed

Compare the letter pairs and count how many are exact matches.

Do not count a pair when only one of its characters matches.

Use a steady scan rhythm instead of repeatedly checking earlier pairs.

2 minutes total No per-question timer Practice gives instant feedback

No time limit · immediate feedback · one player, card updates in place as you go.

Practice mode

Begin when ready. We will track your average time per solved question so you can compare your pace with the timed test.