In the illustration, read the colors of the words aloud. The colors not the words. This task is difficult, as I'm sure you've discovered. Not only is it difficult but it is resistant to practice. The difficulty of removing the interference effect of the words when trying to state the colors is because our brains are conditioned to recognize words without effort. In other words, people see the meaning or words without much effort or consciousness. On the other hand, naming colors is not automatic. It requires more effort than reading, thus creating interference in this simple task. Our pattern of the expectation of reading words is so deeply embedded it cannot be turned off and creates the interference with the task of naming colors
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