The Stroop-style color challenge

What a round looks like

The screen shows the word GREEN in yellow ink. The correct tap is yellow. Tapping green is the usual slip, because reading the word happens faster than naming the ink.

Where the idea comes from

Ink Color Challenge is inspired by this research:

• Stroop, J. R. 1935. Studies of interference in serial verbal reactions. Journal of Experimental Psychology.The original color and word interference experiments, free to read on the Classics in the History of Psychology archive.

This challenge follows the general idea of that task. It is not a clinical or official Stroop test, and your result is not a diagnosis.

For what large studies found about brain training, including the limits, see what the science actually says.

How it plays in Brain Puzzle

Instructions come first. Then you get a short run of words to sort by ink color. The challenge shows up as one of the puzzles in mixed Brain Puzzle workouts.

Difficulty that follows you

Each puzzle type keeps its own level on a scale from 1 to 10, so a strong run in one game does not make another one harder. After every round, the app looks at your recent results for that type.

A steady run of accurate rounds played at a good pace moves the level up one step. A run of rounds with half or fewer answers correct moves it down one step. Quick guesses that turn out wrong never count toward a step up.

The aim is to keep each puzzle challenging but playable. The level describes the game you get, not your intelligence, memory, or health.