Exercises / The Signal

The Signal

Name the ink color, not the word — a classic test of ignoring what a word says.

Trains inhibitory control / selective attention (a classic Stroop color-word interference task). · free, no account needed

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How it works

A color name is displayed in an ink color that may or may not match its meaning; you tap the button matching the ink color, not the word. The proportion of mismatched trials increases as you advance, and the session summary reports the gap between congruent and incongruent reaction times as an "interference cost" metric.

Ranks

1. Novice Signal
2. Signal Reader
3. Sharp Signal
4. Master of Signal
5. Signal Virtuoso
6. Elite Signal
7. Grandmaster Signal
8. Legendary Signal