Diane C. Zelman is a professor in the PhD Program in Clinical Psychology at Alliant International University's California School of Professional Psychology, USA. She is also an assistant clinical professor in the Department of Family and Community Medicine at the University of California-San Francisco, USA. She has published extensively on topics in health psychology, particularly in studies of sleep, chronic pain, and addiction. She is coauthor of What You Need to Know about Sleep Disorders (2021).