Dr. Ingrid Johnsrude's major contributions are related to how the brain is organized for perception of speech and language. She trained as a clinical neuropsychologist, and uses neuroimaging and psychoacoustic methods to study how cognitive control and knowledge facilitate speech comprehension when background sound makes it hard to hear. In particular, she has contributed novel magnetic resonance imaging methods to study brain-behaviour relationships; has discovered how familiar voices aid speech perception in noise, and her work on brain organization supporting speech perception has been influential. Her work is especially clinically relevant for older people, who often have difficulty understanding speech in noise.