Andrew P. VAYDA, Human Ecology, Cook College, P.O.Box 231, Rutgers College, New Brunswick, New Jersey 08903, phone 201 932-9166 (home) 212 222-0647. Affiliations: Department of Human Ecology, Cook College, Rutgers University. Education: Ph.D. Anthropology, Columbia University. Interest in Popper: Popperian methodology and social science. Publications: Recent articles: "Holism and Individualism in Ecological Anthropology," "Actions and Consequences as Objects of Explanation in Human Ecology," "Explaining What People Eat: A Review Article." Activities: Teaching courses on explanation and methodology in social and ecological science; research in Indonesia and elsewhere on processes and mechanisms of social and ecological change.