Letters appear one at a time. Tap MATCH when the current letter is the same as the letter shown 2 steps back.
Example: A → B → A ← Match!
Session: 60 seconds.
Color words appear in mismatched ink colors (e.g., RED).
Tap the button matching the INK COLOR, not the word meaning.
30 trials.
Digits appear one at a time. Recall and tap them in the correct order.
Starts at 3 digits. Each success adds one more digit. Records your maximum span.