Psychosexual development character Oedipus, who unwittingly killed his father, Laius, and sexually possessed his mother, Jocasta. Analogously, in the phallic stage, a girl's decisive psychosexual experience is the Electra complex, her daughter–mother competition for psychosexual possession of father. This psychological complex derives from the 5th-century BC Greek mythologic character Electra, who plotted matricidal revenge with Orestes, her brother, against Clytemnestra, their mother, and Aegisthus, their stepfather, for their murder of Agamemnon, their father, (cf. "Electra", by Sophocles). Initially, Freud equally applied the Oedipus complex to the psychosexual development of boys and girls, but later developed the female aspects of the theory as
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