Why you stumble naming the ink of a clashing colour word: the Stroop effect
30seconds
Name the ink colour of the word GREEN printed in red and you stumble, even though the rule is trivial. In 1935 John Ridley Stroop timed it: naming the ink of clashing colour words took about 74% longer than naming plain colour patches.
Play two quick rounds and measure your own gap, then see why reading is such a strong habit that it barges in uninvited, and why the clash only works in one direction.
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