Arnold gesell maturation theory...
Gesell's maturation theory summary
Arnold Gesell
Arnold Lucius Gesell was among the first psychologists to establish quantitative measures of child development, based on his extensive observations of New Haven children, whom he filmed through oneway mirrors in the laboratory.
Born 1880 in Alma, Wisconsin, a small town that still refers to him as the most famous graduate of Alma High School, Gesell in 1899 graduated with a bachelor’s degree from Steven Point Normal School. In 1906, he earned his PhD from Clark University, specializing in child development under his mentor G.
Stanley Hall (1844–1924). After earning his PhD in psychology, Gesell worked briefly in an elementary school before taking up the post of assistant professor at Yale University in 1911. There he founded the Yale Clinic of Child Development.
At the age of 30, Gesell decided to study medicine, and in 1915, he received his MD from Yale University.
Using his observational studies, Gesell established developmental norms from birth to adolescen