Cognitively speaking, how are synesthetes different from the overall population? Not just in terms of the sensory mixing, but more broadly in thought and experience processing. Are there any interesting studies/theories about this condition, beyond the surface level? Does synesthesia correlate with any other types of mental conditions? I have this, and I tend to see letters/numbers/days of the week/months as colors, while emotions have shapes, isolated sounds have emotion, and music elicits scenes/skits. I'm interested in the cognitive implications of sensory mixing. I started thinking about this after watching a video from the 1950's, an experiment on LSD that was given to an artist:
>https://www.youtube.com/watch?v=ydor_2TaoMg