Arnold Gesell

Arnold Gesell (born June 21, 1880, Alma, Wisconsin, U.S.—died May 29, 1961, New Haven, Connecticut) was an American psychologist and pediatrician, who pioneered the use of motion-picture cameras to study the physical and mental development of normal infants and children and whose books influenced child rearing in the United States. As director of the Clinic of Child Development at Yale University (1911–48), he collected and published a vast quantity of data and amassed a large...