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 ...

Berit Brogaard has had synesthesia, a neurological condition in which different senses combine in unusual ways, for as long as she can remember. We often think of synesthesia as “seeing” sounds in ...

Synesthesia has received increasing attention in popular science writing. Psychology Today describes it as a neurological condition in which stimulation of one sensory or cognitive pathway, for ...