;1900 Russian neurologist
Vladimir Bekhterev discovered the role of the hippocampus in memory. ;1901 German psychiatrist
Alois Alzheimer identified the first case of what later became known as
Alzheimer's disease.
Sigmund Freud published
The Psychopathology of Everyday Life. ;1902 Swiss-born psychiatrist
Adolf Meyer became director of the New York State Psychiatric Institute, influencing American psychiatry with his "common sense" approach which included keeping detailed patient records; he coined the term "mental hygiene". ;1905 French psychologists
Alfred Binet and
Theodore Simon created the
Binet-Simon Scale to assess intellectual ability, marking the start of standardized psychological testing. ;1906 Russian physiologist
Ivan Pavlov published the first
Conditioning studies. ;1908 The term "
Schizophrenia" was coined by Swiss psychiatrist
Paul Eugen Bleuler. ;1909 In September
Sigmund Freud visited
Clark University, winning over the U.S. psychiatric establishment. ;1910
Sigmund Freud founded the
International Psychoanalytical Association (IPA), with
Carl Jung as the first president, and
Otto Rank as the first secretary.
Boris Sidis opened the Sidis Psychotherapeutic Institute (a private hospital) at Maplewood Farms in Portsmouth, NH for the treatment of nervous patients using the latest scientific methods. ;1911
Alfred Adler left Freud's Psychoanalytic Group to form his own school of thought, accusing Freud of overemphasizing sexuality and basing his theory on his own childhood. The
American Psychoanalytic Association (APsaA) was founded. ; 1913 The
British Psychoanalytical Society was founded by
Ernest Jones, who became Freud's biographer. Citing Freud's inability to acknowledge
religion and
spirituality,
Carl Jung split and developed his own theories; his new school of thought became known as
Analytical Psychology.
Jacob L. Moreno pioneered
Group Psychotherapy methods in Vienna, which emphasized spontaneity and interaction; they later became known as
Psychodrama and
Sociometry. ;1914
Sigmund Freud published
On Narcissism: An Introduction. ;1917
Sigmund Freud published
Introduction to Psychoanalysis, and
Mourning and Melancholia. ;1920 Swiss psychiatrist
Hermann Rorschach developed the
Rorschach Inkblot Test. ;1921
Sigmund Freud published
Group Psychology and the Analysis of the Ego. ;1923 German pharmacologist
Otto Loewi and English neuroscientist Sir
Henry Dale discovered
Acetylcholine, the first neurotransmitter to be described, winning them the 1936 Nobel Prize. ;1924 German neuropsychiatrist
Hans Berger discovered human
Electroencephalography.
Otto Rank published
The Trauma of Birth, coining the term "pre-Oedipal", causing Freud to break with him. ;1926 The
Société Psychanalytique de Paris was founded with the endorsement of Sigmund Freud; the Nazis closed it in 1940. ;1927 Austrian psychiatrist
Manfred Sakel developed
Insulin Shock Therapy as a treatment for psychosis; it was discontinued in the 1970s. Austrian physician
Julius Wagner-Jauregg won the
Nobel Prize for his invention of malarial therapy as a treatment for
general paralysis of the insane (
neurosyphilis). He first initiated the treatment in 1917. ;1928
Indian Association for Mental Hygiene established. ;1933 Hungarian psychiatrist
Sándor Ferenczi published a paper claiming that patient accounts of childhood sexual abuse are true, providing a psychological explanation, causing Freud to break with him. ;1935 The Indian division of the
Royal Medico-Psychological Association was formed due to the efforts of Dr.
Banarasi Das. ;1938 Italian neurologist
Ugo Cerletti and Italian psychiatrist
Dr. Lucio Bini discovered
Electroconvulsive Therapy. ;1942 Swiss psychiatrist
Ludwig Binswanger founded
Existential Therapy. The
Controversial Discussions between Sigmund Freud's daughter
Anna Freud and
Melanie Klein, founder of
Object Relations Theory caused the
British Psychoanalytical Society to permanently split into three camps. ;1944
Ritalin (Methylphenidate) was synthesized. ;1946
Mary Jane Ward published the novel
The Snake Pit, which was filmed in 1948, causing reforms in U.S. state psychiatric hospitals. ;1947
Indian Psychiatric Society established. ;1948
Lithium carbonate's ability to stabilize mood highs and lows in
bipolar mood disorder (manic depression) was demonstrated by Australian psychiatrist
John Cade, becoming the first effective medicine for the treatment of mental illness. ;1949 Portuguese neurologist
Egas Moniz won the Nobel Prize for his work on
Lobotomy. ==The era of the new psychopharmacology==