Abstract
Richard Cytowic has argued that synesthetic experimentation by modern artists was based on deliberate contrivances of sensory fusion and not on involuntary experiences of cross-modal association. He has placed artistic experiments with sensory fusion outside the domain of synesthesia research. Artistic experiments, though historically interesting, are considered irrelevant for the study of synesthesia. Contrary to this view I argue that at least Scriabin's and Kandinsky's artistic experiments were based on involuntary experiences of synesthesia. They were investigating perceptual and emotional mechanisms of involuntary synesthetic experiences that meet Cytowic's criteria of synesthesia. Artistic experiments are not only historically interesting, but may also contribute to present synesthesia research.