Pierre Marie Félix Janet was a pioneering French psychologist, physician, philosopher, and psychotherapist in the field of dissociation and traumatic memory.
Pierre Janet
Pierre Janet, by Dornac
William James was an American philosopher and psychologist, and the first educator to offer a psychology course in the United States. James is considered to be a leading thinker of the late 19th century, one of the most influential philosophers of the United States, and the "Father of American psychology."
James in 1903
William James in Brazil, 1865
Portrait of William James by John La Farge, c. 1859
James in a séance with a spiritualist medium