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
Psychosexual development an Introduction to Cross-Cultural Psychology" (1999), Marshall H. Segall et al. propose that Freud based the theory of psychosexual development upon a misinterpretation. Furthermore, contemporary research confirms that although personality traits corresponding to the oral stage, the anal stage, the phallic stage, the latent stage, and the genital stage are observable, they remain undetermined as fixed stages of childhood, and as adult personality traits derived from childhood. Modern scientific ideas about psychosexual development were reflected in the Medical Sexological Model, which was formulated by the Ukrainian scientist Vyacheslav Kholodny in 2014. Postulates of this Model: Psychosexual development In Freudian psychology,