What is Stroop Clash?

The Stroop effect is one of psychology’s most famous findings, described by John Ridley Stroop in 1935: when a color word — say RED — is printed in a different ink color, naming the ink takes measurably longer. Reading is so automatic that it interferes with the color judgment you are actually trying to make.

Stroop Clash turns that lab paradigm into a 20-trial sprint. Every trial is a small battle between the word you read and the color you see.

How to play

1. 1A color word appears on screen in one of four ink colors: red, blue, green or yellow.
2. 2Ignore what the word says — tap the button that matches the ink color.
3. 3Keep the streak alive: accuracy, combo and average response time are recorded for the round.
4. 4If the ink is hard to distinguish, the colorblind-friendly toggle labels the ink color for you.

What it trains

Inhibition control — suppressing an automatic response (reading the word) in favor of a deliberate one (naming the ink). Psychologists measure this interference in milliseconds; the average response time on your result panel is the same idea.

It is also the task behind our 60-second baseline test, so your Stroop Clash rounds and your baseline speak the same language.