To humans, a visual stimulus usually has one clear interpretation even though, in theory, any stimulus can be interpreted in numerous ways. To explain this, the theory focuses on the nature of ...

But from one perspective, these visual illusions are just as real ... "Most ambitiously, we want a unified theory of ...

The hemispheres specialize in distinct mental functions—different aspects of visual perception, for example—but most behaviors and abilities require activity in both halves of the brain.