The famous Stroop effect turned competitive. A colour word appears written in a different ink. You must tap the INK colour, ignoring what the word says. Your brain fights itself — and it gets faster.
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The Stroop effect — your brain automatically reads words faster than it processes colour.
Mental math at full speed. 90 seconds. No calculator.
The circle turns green. Tap it as fast as you can. 10 rounds.
Numbers 1-20 scattered on screen. Tap them in order. As fast as possible.
Targets appear and shrink to nothing. Tap them before they disappear.