Representational Granularity as the Basis of Phenomenal Richness: Why Expertise Deepens Experience

Why does a wine expert’s tasting experience differ qualitatively from that of a novice drinking the same wine? Why does a musician hear layers of complexity in a symphony that escape the untrained ear? We propose the granularity principle: phenomenal richness—the “fineness” or “depth” of subjective experience—corresponds to the granularity of mental representations. Coarse-grained representations (few, broad categories) produce simple phenomenology; fine-grained representations (many, detailed categories) produce rich phenomenology. This principle explains why expertise deepens experience, why first encounters feel simple, and why familiar domains feel more “real.” We distinguish granularity from intensity, specify mechanisms of granular development, and propose testable predictions. The framework integrates developmental, cross-cultural, and expertise research, offering a unified account of phenomenal variation. Unlike existing theories that address discriminative ability or neural complexity, we directly address experiential quality itself. This transforms the puzzle of phenomenal richness from philosophical mystery into tractable empirical question.