Pierre Janet

Pierre Marie Félix Janet (; 30 May 1859 – 24 February 1947) was a pioneering French psychologist, physician, philosopher, and psychotherapist in the field of dissociation and traumatic memory.

He is ranked alongside William James and Wilhelm Wundt as one of the founding fathers of psychology. He was the first to introduce the link between past experiences and present-day disturbances and was noted for his studies involving induced somnambulism. Provided by Wikipedia