Researchers and experiencers have long struggled with defining the hard-to-wrangle trait known as synesthesia. And media attempts are even worse. I'd like to take a stab at advancing a more complete, ...

This study used pupillometry to provide an objective assessment of a form of synesthesia in which people see additional color when reading numbers. It provides convincing evidence that subjective ...

What do Billie Eilish, Kanye West, and Lorde have in common, besides being famous musicians? They all share the same neurological condition, synesthesia, which may play a part in their artistic ...

Vladimir Nabokov first noticed, at age 7, his special gift of synesthesia when playing with colorful alphabet blocks that "were all the wrong color." Source: Contributor: Neil Overy/Alamy Stock Photo.