What is psychological criticism?

Psychological criticism refers to Sigmund Freud's psychoanalytic criticism which is probably a better term to "google" for. It utilizes the concepts of the id, the ego, and the superego and is portrayed in the story, poem or short story in that way. Here is Wikipedia's definition:

Psychoanalytic literary criticism refers to Literary_criticismwhich, in method, concept, Literary_theory, or form, is influenced by the tradition of Psychoanalysisbegun by Sigmund_Freud. Psychoanalytic reading has been practiced since the early development of psychoanalysis itself, and has developed into a rich and heterogeneous interpretive tradition.