 She spent six months at the Boston Psychopathic Hospital, now the Massachusetts Mental Health Center, and six months at the New York Psychoanalytic Society.In New York she worked with psychiatrist Abram Kardiner, who became her mentor and collaborator for several projects in cross-cultural diagnosis and the psychoanalytic study of culture.Du Bois also taught at Hunter College in 1936–1937 while developing a fieldwork project to test their new ideas.