This project was conducted in collaboration with Simon Rigoulot, Melissa Kadi and Simone Dalla Bella at the International Laboratory for Brain, Music and Sound Research (BRAMS) in Montreal, Canada.

We investigated EEG responses to auditory oddball sequences that had an isochronous or random inter-stimulus interval (ISI), while comparing younger with older adults.

We found that the P50 distinguishes between isochrounous and random standard tones in the younger adult group, but not in the older one.