Core expertise
Circadian rhythms and sleep
Biography
Andrew's research vision is to understand the physiology and functions of circadian rhythms and sleep, with three main areas of focus: he importance of sleep regularity for human health; the sensitivity of the human circadian system to light; the development of physiological models for predicting circadian timing, sleep, and alertness.
He's developed mathematical models and health-based metrics that are widely used in the sleep and circadian fields, including the Sleep Regularity Index (SRI). He has also made fundamental discoveries about the circadian system, including inter-individual differences in sensitivity to light. His work is closely integrated with experiments, so that model predictions can be tested and additional insights gleaned from data.