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

In the first long-term study on grapheme-color synesthesia, researchers followed 80 children, including 8 synesthetes, to determine when and how associations between graphemes and colors develop. What ...

Synesthesia is a condition in which sensory input from one cognitive stream gives rise to experience in another unstimulated cognitive stream. The most common forms of synesthesia include ...

If you happen to find yourself seeing music, smelling color, or unusually combining two other senses, you may have synesthesia, a possibly genetic condition that affects about 4 percent of the ...

What colour is H? Is 4 brighter than 9? For most people these questions might seem baffling, but not for people with grapheme-color synesthesia. In the first long-term childhood study on ...