Stroop Effect

In psychology, the Stroop effect is a demonstration of the reaction time of a task. When a word such as blue, green, red, etc. is printed in a color differing from the color expressed by the word's semantic value (e.g. the word "red" printed in blue ink), naming the color of the word takes longer and is more prone to errors than when the meaning of the word is congruent with its ink color. The effect is named after John Ridley Stroop who first published the effect in English in 1935.[1] The effect had previously been published in 1929, but only in German. [2][3][4] The original paper has been one of the most cited papers in the history of experimental psychology, leading to over 700 replications.