Perceptual Speed Test

This test measures how quickly and accurately you can identify matching letter pairs.

How it Works

  • You will see four pairs of letters arranged horizontally
  • Count how many pairs are exact matches (same letter, different case)
  • Select the number of matching pairs (0-4)

Example

[E e] [Q y] [D d] [K k] → 3 matches (E/e, D/d, K/k)

Basic Operation

  • Look at each pair carefully
  • Count pairs where both letters are the same (ignoring case)
  • Click on the number that represents the count of matching pairs
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