Finding the “odd one out”: Memory color effects and the logic of appearance

Can what we know change what we see? A line of research stretching back nearly a century suggests that knowing an object’s canonical color can alter its visual appearance, such that objectively gray bananas appear to be tinged with yellow, and objectively orange hearts appear redder than they really are. Such “memory color” effects have constituted the strongest and most complete evidence that basic sensory processing can be penetrated by...