Electra complex classical psychoanalytic theory, the child's identification with the same-sex parent is the successful resolution of the Electra complex and of the Oedipus complex; his and her key psychological experience to developing a mature sexual role and identity. Sigmund Freud instead proposed that girls and boys resolved their complexes differently—she via penis envy, he via castration anxiety; and that unsuccessful resolutions might lead to neurosis. Hence, women and men who are fixated in the Electra and Oedipal stages of their psychosexual development might be considered "father-fixated" and "mother-fixated". As a psychoanalytic term for daughter–mother psychosexual conflict, the Electra complex derives from
Oedipus complex infant boy internalizes the familial rules of his father. In contrast, in the early 1920s, using the term "pre-Oedipal", Otto Rank proposed that a boy's powerful mother was the source of the super-ego, in the course of normal psychosexual development. Rank's theoretic conflict with Freud excluded him from the Freudian inner circle; nonetheless, he later developed the psychodynamic Object relations theory in 1925. Whereas Freud proposed that father (the paternal phallus) was central to infantile and adult psychosexual development, Melanie Klein concentrated upon the early maternal relationship, proposing that Oedipal manifestations are perceptible in the first year of life, the