AJ’s research focuses on speech and speaker processing, and how they change as a function of experience – whether over development, or due to individual differences. His dissertation work examined how bilingual parents talk to their infants, and how bilingualism affects speech processing and early vocalizations. He also conducts research on voice processing in infancy. In this line of work, he is examining the early steps of voice recognition. He is also collaborating with the Cochlear Implant Clinic at the B.C. Children’s Hospital to examine how these skills develop in children with cochlear implants.