Anthony D. Ong, PhD, is Professor of Psychology and Director of the Human Health Labs at Cornell University and Professor of Gerontology in Medicine at Weill Cornell Medicine. His research examines how everyday emotional and social experiences shape health and development across the lifespan, including how social connection is maintained, disrupted, and repaired and how these processes become biologically embedded in adulthood and aging. His work integrates lifespan psychology, affective science, and behavioral medicine, drawing on intensive longitudinal and daily-life methods. Much of his recent work speaks directly to the measurement of social connection: he is a co-investigator on an NIA-funded study using integrative data analysis to advance research on social isolation, loneliness, and cognitive functioning in older adults; contributed to a coordinated analysis of longitudinal studies on whether loneliness increases with age; and has developed and validated a multidimensional construct of cumulative social advantage linked to health and longevity. He served on the Scientific Advisory Board for the U.S. Surgeon General’s 2023 Advisory on the epidemic of loneliness and isolation. Dr. Ong is a Fellow of the Gerontological Society of America and has received GSA’s Margaret M. and Paul B. Baltes Early Career Award and the Society for Affective Science’s Mid-Career Trajectory Award. He received his PhD in psychology from the University of Southern California and his BA in psychology from California State University, Los Angeles.