A great overview of multiple facets related to Synaesthesia. The varied types of experiences living with, and other aspects of Synaesthesia have a common thread... consistency. Those, 4 in 100 average and 15 per 100 in the arts, bear a consistency in their perceptions over time whether it is taste, sound, auditory, etc. One does not shift their experience with whatever aspect of Synaesthesia they possess. Many Synaesthesia individuals experience the same, or identical, number-color associations. Brain patterns during experiences have also been documented regularly and thoroughly over recent years.
Well worth the read. I know someone who sees colors with numbers, not outwardly, but some numbers are automatically thought of as a color, internalized vs externalized... 8-black, 4-Red, 3-yellow, etc., so this work was of extra interest to me.
Small type in my copy made it harder to read comfortably.