This article is about the perceptual phenomenon. For the piano keyboard video game, see Synthesia. This article cites its sources but does not provide page references. You can help 92 ways to talk to anyone pdf free improve it by introducing citations that are more precise.
How someone with synesthesia might perceive certain letters and numbers. Synesthesia is a perceptual phenomenon in which stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People who report a lifelong history of such experiences are known as synesthetes.
In one common form of synesthesia, known as grapheme-color synesthesia or color-graphemic synesthesia, letters or numbers are perceived as inherently colored. Synesthetic associations can occur in any combination and any number of senses or cognitive pathways. Little is known about how synesthesia develops. It has been suggested that synesthesia develops during childhood when children are intensively engaged with abstract concepts for the first time.