Abstract
I argue on the basis of extensive empirical research that perception and emotion are more deeply entangled than we might have thought. This evidence strongly suggests that we should expand our conception of perception to include emotional elements, and our conception of emotion to include perceptual ones. This expansion poses a challenge to our current taxonomic practices. In the face of this challenge, I advocate principled pluralism about psychological kinds. This view holds that, depending on our explanatory purposes, psychological processes can be legitimately classified in more than one way.