How does perception result in thoughts about items in the world (such as dogs or flowers) and in conscious states of many kinds (such as experiences of seeing red)? How does perception provide evidence for our beliefs (such as the belief that there is a red rose in front of you)?

In The Unity of Perception: Content, Consciousness, and Evidence (Oxford University Press, 2018), Susanna Schellenberg considers these questions about the role of perception in mind and knowledge. Schellenberg, who is professor of philosophy and cognitive science at Rutgers University, offers a unified account of perception as the capacity to discriminate and single out particulars, and defends the answers that “capacitism” provides to such questions as the relation between perception and consciousness and the way in which hallucinators and perceivers share some types of evidence for their beliefs but differ importantly in others.