Synesthetes: A Handbook

by Sean A. Day

Synesthesia is the general name for a related set of cognitive traits. Synesthesia may be divided into two general, somewhat overlapping forms. In the first, “synesthesia proper”, stimuli to a sensory input will also trigger perceptions in one or more other sensory modes. For example, a person might not only hear music, but also see it; or might not only feel a touch to the hand, but also taste it. In the second form of synesthesia, called "cognitive category synesthesia", sets of things which cultures teach us to put together and categorize, such as letters, numbers, or people's names, also get sensory addition, such as a smell, color or flavor. The letter ‘A’ might be seen as red; the word ‘book’ might put a taste of oranges in one’s mouth. Synesthesia affects more than 3.7% of the world’s population – that’s at least one out of every 27 people! Yet it is generally unknown to most people. This book explores more than 80 different types of synesthesia, from the more common, such as colored letters and numbers and time-lines, to the extraordinarily rare, such as flavors in one’s mouth producing perceptions of musical chords. The author is himself a multiple synesthete who has researched and interacted with other synesthetes around the world for over 25 years.

152 pages, Paperback

Published June 28, 2016