When I was little, I didn’t understand why calendars were in a grid, because to me, the months of the year present in the ...

Brooke Bhola, 24, has always associated letters with colors. When she sees a U, it’s yellow. The letter N is light blue. And T is orange. She thought these sensations were unique to her until she ...

Synesthesia is a perceptual experience in which one sensory input (like a letter or number) is automatically associated with another sensory experience (like a color or feeling). The prevalence of ...

Richard Cytowic, a pioneering researcher who returned synesthesia to mainstream science, traces the historical evolution of our understanding of the phenomenon. By Richard E. Cytowic / MIT Press ...

Pupil size in people with synesthesia changed depending on how bright or dark the perceived colors were.