Simon effect

In psychology, the Simon effect refers to the finding that reaction times are usually faster, and reactions are usually more accurate, when the stimulus occurs in the same relative location as the response, even if the stimulus location is irrelevant to the task. It is named for J. R. Simon who first published the effect in the late 1960s. Simon's original explanation for the effect was that there is an innate tendency to respond toward the source of stimulation.