Who is The Psychologist from The Poetics of Space and what is their importance?

The Psychologist in Bachelard's work is a scientist of human behavior. The author asserts "everything specifically human in man is logos" should be the working hypothesis to explain the poetic imagination. Logos is the indescribable source of reverberation about which a psychologist tries to describe his feelings. Bachelard claims philosophers and psychologists ignore miniature worlds and objects that appear in fairy tales.