Synesthetic Perception as Continuous with Ordinary Perception, or

It appears that the distinctive feature at the core of our understanding of synesthesia—informational integration between psychological systems—is also ubiquitous in normal perception. This observation invites the question whether synesthesia is a fundamentally distinct, pathological outlier, or a syndrome continuous with capacities present in normal perception. In this chapter I offer several arguments for the continuity view. I suggest that the forms of integration in synesthetic and normal perception exhibit striking, detailed, and unexpected similarities, while the evidence some have taken to reveal significant, qualitative dissimilarities is less decisive than it may first appear. Moreover, the continuity view correctly predicts the otherwise surprising result that synesthetes perform better than non-synesthete controls in integrative perceptual tasks that don’t implicate synesthetic perception. I’ll conclude that synesthetic perception is usefully viewed as closer to non-synesthetic perception (a fortiori, less clearly pathological) than standard views allow.