Long-term versus short-term consistency in the grapheme-colour synaesthesia: Grapheme-colour pairings can change in adulthood.

The aim of the article is to examine the stability of grapheme-colour matchings in adulthood. We carried out a panel study using computerized tests to measure short-term and long-term consistency. We conducted three testing rounds during 1 year and a half with a resulting sample of 26 synaesthetes.