Final answer:
Erik Erikson created the eight-stage theory of psychosocial development, focusing on the social factors affecting personality development throughout life.
Step-by-step explanation:
The psychologist who developed the stages of human growth and development chart is Erik Erikson. Erikson extended Freud's theory and proposed an eight-stage theory of psychosocial development that spans from birth to death. Unlike Freud, who emphasized psychosexual stages, Erikson focused on the social and environmental factors that contribute to personality development over the entire lifespan. Erikson's stages include challenges and tasks that individuals need to resolve to develop a healthy sense of self.