How Altering Gestalt Principles Influences Aesthetic Judgment: a Study on St. Agnes Outside the Walls

Aesthetic experience, as rooted in cognition and perception, is naturally subject to Gestalt laws. This study investigated how modifying three Gestalt laws - symmetry, figure-ground organization, and common fate - affected the aesthetic appreciation of an ancient mosaic. One hundred twenty-seven subjects rated original and altered mosaics with standardized questionnaires. Results showed that the original mosaic was highest on aesthetics, while modifications yielded lower appreciation. Additionally, participants who were familiar with the mosaic and had greater art experience rated higher on aesthetics. These findings reflect the role of Gestalt principles in aesthetic appreciation and suggest the preference for visually structured coherence. The study also reveals how art know-how and acquaintance interact with cognitive and perceptual variables to shape aesthetic judgment. However, limitations such as the cultural context and the unchanging nature of stimuli warn against the generalizability of results and require follow-up research in a wide variety of art.