Academic Press Series in Cognition and Perception: The Unity of the Senses: Interrelations Among the Modalities focuses on the perceptual processes, approaches, and methodologies involved in studies on the unity of the senses. The publication first elaborates on the doctrines of equivalent information, analogous sensory attributes and qualities, and common psychophysical properties. Discussions focus on discrimination, sensitivity, sound symbolism, intensity, brightness, and cross-modal perception of size, form, and space. The text then examines the doctrine of neural correspondences and sound symbolism in poetry, including sound and meaning, analogue and formal representation, vowel symbolism in poetry, coding perceptual information, coding sensory attributes, and evolution and development. The manuscript takes a look at synesthetic metaphor in poetry, as well as unity of the senses and synesthetic metaphor, warm and cool colors, synesthetic metaphors of odor and music, metaphorical imperative, and the music of Conrad Aiken. The publication is a valuable source of data for researchers interested in the unity of the senses.