---
title: "History of psychology"
chunk: 7/15
source: "https://en.wikipedia.org/wiki/History_of_psychology"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:00:20.149396+00:00"
instance: "kb-cron"
---

Experimentation was not the only approach to psychology in the German-speaking world at this time. Starting in the 1890s, employing the case study technique, the Viennese physician Sigmund Freud developed and applied the methods of hypnosis, free association, and dream interpretation to reveal putatively unconscious beliefs and desires that he argued were the underlying causes of his patients' "hysteria". He dubbed this approach psychoanalysis. Freudian psychoanalysis is particularly notable for the emphasis it places on the course of an individual's sexual development in pathogenesis. Psychoanalytic concepts have had a strong and lasting influence on Western culture, particularly on the arts. Although its scientific contribution is still a matter of debate, both Freudian and Jungian psychology revealed the existence of compartmentalized thinking, in which some behavior and thoughts are hidden from consciousness – yet operative as part of the complete personality. Hidden agendas, a bad conscience, or a sense of guilt, are examples of the existence of mental processes in which the individual is not conscious, through choice or lack of understanding, of some aspects of their personality and subsequent behavior.
Psychoanalysis examines mental processes which affect the ego. An understanding of these theoretically allows the individual greater choice and consciousness with a healing effect in neurosis and occasionally in psychosis, both of which Richard von Krafft-Ebing defined as "diseases of the personality".
Freud founded the International Psychoanalytic Association in 1910, inspired also by Ferenczi. Main theoretical successors were Anna Freud (his daughter) and Melane Klein, particularly in child psychoanalysis, both inaugurating competing concepts; in addition to those who became dissidents and developed interpretations different from Freud's psychoanalytic one, thus called by some neo-freudians, or more correctly post-freudians: the most known are Alfred Adler (individual psychology), Carl Gustav Jung (analytical psychology), Otto Rank, Karen Horney, Erik Erikson and Erich Fromm.
Jung was an associate of Freud's who later broke with him over Freud's emphasis on sexuality. Working with concepts of the unconscious first noted during the 1800s (by John Stuart Mill, Krafft-Ebing, Pierre Janet, Théodore Flournoy and others), Jung defined four mental functions which relate to and define the ego, the conscious self:

Sensation, which tell consciousness that something is there.
Feelings, which consist of value judgments, and motivate our reaction to what we have sensed.
Intellect, an analytic function that compares the sensed event to all known others and gives it a class and category, allowing us to understand a situation within a historical process, personal or public.
And intuition, a mental function with access to deep behavioral patterns, being able to suggest unexpected solutions or predict unforeseen consequences, "as if seeing around corners" as Jung put it.
Jung insisted on an empirical psychology on which theories must be based on facts and not on the psychologist's projections or expectations.