The Stroop Effect

The Stroop Effect is named after John Ridley Stroop, who published the effect in English in 1935 in an article entitled Studies of interference in serial verbal reactions this includes three different experiments.The effect was first published in 1929 in German, and its roots can be followed back to works of James McKeen Cattell and Wilhelm Wundt in the nineteenth century. In the first experiment, stimuli 1 and 2 were used. The task required the participants to read the written color names of the words independently of the color of the ink (for example, they would have to read "purple" no matter what the color of its ink was).