Multiple influences of reward on perception and attention.

Visual processing is influenced by stimulus-driven and goal-driven factors. Recent interest has centered on understanding how reward might provide additional contributions to visual perception and unraveling the underlying neural mechanisms. In this review, I suggest that the impact of reward on vision is not unitary and depends on the type of experimental manipulation. With this in mind, I outline a possible classification of the main paradigms employed in the literature and discuss potential brain processes that operate during some of the experimental manipulations described.