Diana Deutsch, Professor of Psychology at UC San Diego, presents several musical illusions that she has discovered, showing that people can differ strikingly in the way they hear simple musical patterns. She also explains why perfect pitch is rare in most populations, but not among speakers of tonal languages, such as Mandarin. Deutsch's lecture is the sixth and final installment of the "To Be Musical" series, sponsored by Eleanor Roosevelt College at UC San Diego. (#24510)