Granville Stanley Hall was the main person that helped establish developmental psychology as a branch of psychology after he graduated from Harvard University with a doctoral degree in the subject and spoke about "new" psychology that could help raise children. (Thompson & Clark 2012). The history of Developmental Psychology wasn't only started by G.S. Hall; in part, the Child Study Movement was a huge part of it. Thompson & Clark (2012), stated that "In 1891, he [Granville Stanley Hall] began a journal called Pedagogical Seminary, which is usually considered the first journal of developmental psychology" (p.21). Granville Hall wrote about 400 publications and was influential in helping to put developmental psychology on the map of things to be studied, there isn't much about to be found about him because he isn't as famous as others theorists (McCullers 1969, p. 1109) In the article called G. Stanley Hall: from philosophy to developmental psychology, it states that:
Because Hall was active and influential at just the right time, he compiled many firsts and foundings- as Wundt's first American student, first American professor of psychology, founder of what some say was the first American psychology laboratory, founder of the American Journal of Psychology, first President of Clark University, founder and first
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The book Developmental Psychology in Historical Perspective, states that developmental psychology has been applied throughout the years, starting in the 1500's BCE, and then in the 1930's where Sigmund Freud's theory and Kurt Lewin's theory were applied, to the 1950's where parenting was the focus, and moved from descriptive studies to a more experimental focus where cognitive development was introduced and Jean Piaget was the most influential theorist on the subject (Thompson & Clark