Diana Deutsch is Professor of Psychology at the University of California, San Diego.

Diana Deutsch is Professor of Psychology at the University of California, San Diego, She is internationally known for the musical illusions and paradoxes that she discovered; these include the octave illusion, the scale illusion, the glissando illusion, the tritone paradox,  the cambiata illusion, the phantom words illusion and the speech-to-song illusion, among others. She also explores memory for music, and  how we relate the sounds of music and speech to each other. In addition she studies absolute pitch – why some people possess it, and why it is so rare.