Timeline of psychotherapy
Encyclopedia
This article is a compiled timeline of psychotherapy
Psychotherapy
Psychotherapy is a general term referring to any form of therapeutic interaction or treatment contracted between a trained professional and a client or patient; family, couple or group...

. A more general description of the development of the subject of psychology
Psychology
Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...

 can be found in the history of psychology
History of psychology
The history of psychology as a scholarly study of the mind and behavior dates back to the Ancient Greeks. There is also evidence of psychological thought in ancient Egypt. Psychology was a branch of philosophy until the 1870s, when psychology developed as an independent scientific discipline in...

 article. Likewise, a more general review of important events in the development of psychology can be found in the timeline of psychology
Timeline of psychology
This article is a compiled timeline of psychology. A more general description of the development of the subject of psychology can be found in the history of psychology article...

 article.

Antiquity

  • ca. 1550 BCE – Ancient Egyptians codified their knowledge of psychiatry, medicine, and surgery in the Ebers Papyrus
    Ebers papyrus
    The Ebers Papyrus, also known as Papyrus Ebers, is an Egyptian medical papyrus dating to circa 1550 BC. Among the oldest and most important medical papyri of ancient Egypt, it was purchased at Luxor, in the winter of 1873–74 by Georg Ebers...

     and the Edwin Smith Papyrus
    Edwin Smith papyrus
    The Edwin Smith Papyrus is an Ancient Egyptian medical text and the oldest known surgical treatise on trauma. It dates to Dynasties 16-17 of the Second Intermediate Period in Ancient Egypt, ca. 1500 BCE. The Edwin Smith papyrus is unique among the four principal medical papyri in existencethat...

    . The former mentioned dementia
    Dementia
    Dementia is a serious loss of cognitive ability in a previously unimpaired person, beyond what might be expected from normal aging...

     and depression, while the latter gave detailed instructions for various neurosurgical procedures. The power of magic
    Magic (paranormal)
    Magic is the claimed art of manipulating aspects of reality either by supernatural means or through knowledge of occult laws unknown to science. It is in contrast to science, in that science does not accept anything not subject to either direct or indirect observation, and subject to logical...

     (suggestion
    Suggestion
    Suggestion is the psychological process by which one person guides the thoughts, feelings, or behaviour of another. Nineteenth century writers on psychology such as William James used the words "suggest" and "suggestion" in senses close to those they have in common speech—one idea was said to...

    ) was recognized as complementary to medicine.
  • ca. 500 BCE – Siddhartha Gautama founded the psychotherapeutic practices of Buddhism
    Buddhism
    Buddhism is a religion and philosophy encompassing a variety of traditions, beliefs and practices, largely based on teachings attributed to Siddhartha Gautama, commonly known as the Buddha . The Buddha lived and taught in the northeastern Indian subcontinent some time between the 6th and 4th...

     on the principle that the origin of mental suffering is ignorance, that the symptoms of ignorance are attachment and craving, and that attachment and craving can be ended by following the Eightfold Path.
  • ca. 400 BCE – Hippocrates
    Hippocrates
    Hippocrates of Cos or Hippokrates of Kos was an ancient Greek physician of the Age of Pericles , and is considered one of the most outstanding figures in the history of medicine...

     taught that melancholia
    Melancholia
    Melancholia , also lugubriousness, from the Latin lugere, to mourn; moroseness, from the Latin morosus, self-willed, fastidious habit; wistfulness, from old English wist: intent, or saturnine, , in contemporary usage, is a mood disorder of non-specific depression,...

     (depression) has a biological cause, namely an excess of black bile, one of the four humours
    Four humours
    Four Temperaments is a theory of proto-psychology that stems from the ancient medical concept of humorism and suggests that four bodily fluids affect human personality traits and behaviors.- History and development :...

    . Ancient Greek therapy for disorders of mood involved adjustment of the humours, to bring them into balance.
  • ca. 300 BCE – Composition of the Huangdi Neijing began in China. This medical work emphasized the relationship between organs and emotions, and formalized the theory of Qi (life-force) and the balancing of the primal forces of Yin and yang
    Yin and yang
    In Asian philosophy, the concept of yin yang , which is often referred to in the West as "yin and yang", is used to describe how polar opposites or seemingly contrary forces are interconnected and interdependent in the natural world, and how they give rise to each other in turn. Opposites thus only...

    .

10th century

  • ca. 900 – The concepts of mental health
    Mental health
    Mental health describes either a level of cognitive or emotional well-being or an absence of a mental disorder. From perspectives of the discipline of positive psychology or holism mental health may include an individual's ability to enjoy life and procure a balance between life activities and...

     or "mental hygiene" were introduced by Ahmed ibn Sahl al-Balkhi
    Ahmed ibn Sahl al-Balkhi
    Abu Zayd Ahmed ibn Sahl Balkhi was a Persian Muslim polymath: a geographer, mathematician, physician, psychologist and scientist. Born in 850 CE in Shamistiyan, in the Persian province of Balkh, Khorasan , he was a disciple of al-Kindi...

    . He also recognized that illnesses can have both psychological and/or physiological causes.
  • ca. 900 – al-Razi
    Al-Razi
    Muhammad ibn Zakariyā Rāzī , known as Rhazes or Rasis after medieval Latinists, was a Persian polymath,a prominent figure in Islamic Golden Age, physician, alchemist and chemist, philosopher, and scholar....

     (Rhazes) recognized the concept of "psychotherapy" and referred to it as al-‘ilaj al-nafs
    Nafs
    Nafs is an Arabic word which occurs in the Qur'an and means self, psyche, ego or soul. In its unrefined state, "the ego is the lowest dimension of man's inward existence, his animal and satanic nature." Nafs is an important concept in the Islamic tradition, especially within Sufism and the...

    .

11th century

  • 1025 – In The Canon of Medicine
    The Canon of Medicine
    The Canon of Medicine is an encyclopedia of Galenic medicine in five books compiled by Ibn Sīnā and completed in 1025. It presents a clear and organized summary of all the medical knowledge of the time...

    , Avicenna
    Avicenna
    Abū ʿAlī al-Ḥusayn ibn ʿAbd Allāh ibn Sīnā , commonly known as Ibn Sīnā or by his Latinized name Avicenna, was a Persian polymath, who wrote almost 450 treatises on a wide range of subjects, of which around 240 have survived...

     described a number of conditions, including hallucination
    Hallucination
    A hallucination, in the broadest sense of the word, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, in that they are vivid,...

    , insomnia
    Insomnia
    Insomnia is most often defined by an individual's report of sleeping difficulties. While the term is sometimes used in sleep literature to describe a disorder demonstrated by polysomnographic evidence of disturbed sleep, insomnia is often defined as a positive response to either of two questions:...

    , mania
    Mania
    Mania, the presence of which is a criterion for certain psychiatric diagnoses, is a state of abnormally elevated or irritable mood, arousal, and/ or energy levels. In a sense, it is the opposite of depression...

    , nightmare
    Nightmare
    A nightmare is an unpleasant dream that can cause a strong negative emotional response from the mind, typically fear or horror, but also despair, anxiety and great sadness. The dream may contain situations of danger, discomfort, psychological or physical terror...

    , melancholia
    Melancholia
    Melancholia , also lugubriousness, from the Latin lugere, to mourn; moroseness, from the Latin morosus, self-willed, fastidious habit; wistfulness, from old English wist: intent, or saturnine, , in contemporary usage, is a mood disorder of non-specific depression,...

    , dementia
    Dementia
    Dementia is a serious loss of cognitive ability in a previously unimpaired person, beyond what might be expected from normal aging...

    , epilepsy
    Epilepsy
    Epilepsy is a common chronic neurological disorder characterized by seizures. These seizures are transient signs and/or symptoms of abnormal, excessive or hypersynchronous neuronal activity in the brain.About 50 million people worldwide have epilepsy, and nearly two out of every three new cases...

    , paralysis
    Paralysis
    Paralysis is loss of muscle function for one or more muscles. Paralysis can be accompanied by a loss of feeling in the affected area if there is sensory damage as well as motor. A study conducted by the Christopher & Dana Reeve Foundation, suggests that about 1 in 50 people have been diagnosed...

    , stroke, vertigo
    Vertigo (medical)
    Vertigo is a type of dizziness, where there is a feeling of motion when one is stationary. The symptoms are due to a dysfunction of the vestibular system in the inner ear...

     and tremor
    Tremor
    A tremor is an involuntary, somewhat rhythmic, muscle contraction and relaxation involving to-and-fro movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs. Most tremors occur in the...

    .

12th century

  • ca. 1150 – Ibn Zuhr
    Ibn Zuhr
    Abū Merwān ’Abdal-Malik ibn Zuhr was a Muslim physician, surgeon and teacher in Al-Andalus.He was born at Seville...

     (Avenzoar) gave the first accurate descriptions on certain neurological disorders such as meningitis
    Meningitis
    Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs...

    , intracranial thrombophlebitis
    Thrombophlebitis
    Thrombophlebitis is phlebitis related to a thrombus . When it occurs repeatedly in different locations, it is known as "Thrombophlebitis migrans" or "migrating thrombophlebitis".-Signs and symptoms:...

    , and mediastinal germ cell tumor
    Mediastinal germ cell tumor
    Malignant mediastinal germ cell tumors of various histologies were first described as a clinical entity approximately 50 years ago. Mediastinal and other extragonadal germ cell tumors were initially thought to represent isolated metastases from an inapparent gonadal primary site.-Etiology:Some...

    s.
  • ca. 1150 – Averroes
    Averroes
    ' , better known just as Ibn Rushd , and in European literature as Averroes , was a Muslim polymath; a master of Aristotelian philosophy, Islamic philosophy, Islamic theology, Maliki law and jurisprudence, logic, psychology, politics, Arabic music theory, and the sciences of medicine, astronomy,...

     suggested the existence of Parkinson's disease
    Parkinson's disease
    Parkinson's disease is a degenerative disorder of the central nervous system...

    .

13th century

  • ca. 1200 – Maimonides
    Maimonides
    Moses ben-Maimon, called Maimonides and also known as Mūsā ibn Maymūn in Arabic, or Rambam , was a preeminent medieval Jewish philosopher and one of the greatest Torah scholars and physicians of the Middle Ages...

     wrote about neuropsychiatric disorders and described rabies
    Rabies
    Rabies is a viral disease that causes acute encephalitis in warm-blooded animals. It is zoonotic , most commonly by a bite from an infected animal. For a human, rabies is almost invariably fatal if post-exposure prophylaxis is not administered prior to the onset of severe symptoms...

     and belladonna
    Deadly nightshade
    Atropa belladonna or Atropa bella-donna, commonly known as Belladonna, Devil's Berries, Death Cherries or Deadly Nightshade, is a perennial herbaceous plant in the family Solanaceae, native to Europe, North Africa, and Western Asia. The foliage and berries are extremely toxic, containing tropane...

     intoxication.

15th century

  • 1403 The Bethlem Royal Hospital of London
    Bethlem Royal Hospital
    The Bethlem Royal Hospital is a psychiatric hospital located in London, United Kingdom and part of the South London and Maudsley NHS Foundation Trust. Although no longer based at its original location, it is recognised as the world's first and oldest institution to specialise in mental illnesses....

    , (Bedlam) (established as a hospital in 1330) admitted its first mentally ill patients. The care amounted to little more than restraint.

16th century

  • 1567 – Paracelsus
    Paracelsus
    Paracelsus was a German-Swiss Renaissance physician, botanist, alchemist, astrologer, and general occultist....

    ' Von den Krankeiten was posthumously published, introducing his clinical system of psychotherapy.

1770s

  • 1770 – Johann Joseph Gassner
    Johann Joseph Gassner
    Johann Joseph Gassner was a noted exorcist.While a Catholic priest at Klösterle he gained a wide celebrity by professing to "cast out devils" and to work cures on the sick by means simply of prayer; he was attacked as an impostor, but the bishop of Regensburg, who believed in his honesty,...

     initiated a therapeutic practice using a precursor of hypnotherapy
    Hypnotherapy
    Hypnotherapy is a therapy that is undertaken with a subject in hypnosis.The word "hypnosis" is an abbreviation of James Braid's term "neuro-hypnotism", meaning "sleep of the nervous system"....

     and exorcism
    Exorcism
    Exorcism is the religious practice of evicting demons or other spiritual entities from a person or place which they are believed to have possessed...

    .
  • 1774 – Franz Mesmer
    Franz Mesmer
    Franz Anton Mesmer , sometimes, albeit incorrectly, referred to as Friedrich Anton Mesmer, was a German physician with an interest in astronomy, who theorised that there was a natural energetic transference that occurred between all animated and inanimate objects that he called magnétisme animal ...

     described the therapeutic properties of "animal magnetism
    Animal magnetism
    Animal magnetism , in modern usage, refers to a person's sexual attractiveness or raw charisma. As postulated by Franz Mesmer in the 18th century, the term referred to a supposed magnetic fluid or ethereal medium believed to reside in the bodies of animate beings...

    " (hypnotherapy
    Hypnotherapy
    Hypnotherapy is a therapy that is undertaken with a subject in hypnosis.The word "hypnosis" is an abbreviation of James Braid's term "neuro-hypnotism", meaning "sleep of the nervous system"....

    ), and began a clinical practice.

1780s

  • 1785 – Marquis de Puységur
    Marquis de Puységur
    Although Armand-Marie-Jacques de Chastenet, Marquis de Puységur , was a French aristocrat from one of the most illustrious families of the French nobility, he is now remembered as one of the pre-scientific founders of hypnotism .The Marquis de Puységur learned about Mesmerism from his brother...

     founded the Société Harmonique des Amis Réunis to train specialists in Mesmerism (hypnotherapy
    Hypnotherapy
    Hypnotherapy is a therapy that is undertaken with a subject in hypnosis.The word "hypnosis" is an abbreviation of James Braid's term "neuro-hypnotism", meaning "sleep of the nervous system"....

    ).

1790s

  • 1793 – Jean-Baptiste Pussin, working with Philippe Pinel
    Philippe Pinel
    Philippe Pinel was a French physician who was instrumental in the development of a more humane psychological approach to the custody and care of psychiatric patients, referred to today as moral therapy...

    , began releasing incarcerated mental patients from chains and iron shackles in the first movement for the humane treatment of the mentally ill.

1800s

  • 1801 – Philippe Pinel
    Philippe Pinel
    Philippe Pinel was a French physician who was instrumental in the development of a more humane psychological approach to the custody and care of psychiatric patients, referred to today as moral therapy...

     published the first psychological approach to the treatment of the insane. The work appeared in English translation in 1806, as Treatise on Insanity.

1810s

  • 1813 – Abbé Faria
    Abbé Faria
    Abbé Faria , or Abbé José Custódio de Faria, , was a colourful Goan Catholic monk who was one of the pioneers of the scientific study of hypnotism, following on from the work of Franz Anton Mesmer...

     identified the central role of suggestion in "animal magnetism
    Animal magnetism
    Animal magnetism , in modern usage, refers to a person's sexual attractiveness or raw charisma. As postulated by Franz Mesmer in the 18th century, the term referred to a supposed magnetic fluid or ethereal medium believed to reside in the bodies of animate beings...

    " (hypnotherapy
    Hypnotherapy
    Hypnotherapy is a therapy that is undertaken with a subject in hypnosis.The word "hypnosis" is an abbreviation of James Braid's term "neuro-hypnotism", meaning "sleep of the nervous system"....

    ).

1820s

  • 1826 – Justinus Kerner
    Justinus Kerner
    Justinus Andreas Christian Kerner was a German poet and medical writer.-Life:He was born at Ludwigsburg in Württemberg...

     began treatment of patients with a combination of "animal magnetism
    Animal magnetism
    Animal magnetism , in modern usage, refers to a person's sexual attractiveness or raw charisma. As postulated by Franz Mesmer in the 18th century, the term referred to a supposed magnetic fluid or ethereal medium believed to reside in the bodies of animate beings...

    " (hypnotherapy
    Hypnotherapy
    Hypnotherapy is a therapy that is undertaken with a subject in hypnosis.The word "hypnosis" is an abbreviation of James Braid's term "neuro-hypnotism", meaning "sleep of the nervous system"....

    ) and exorcism
    Exorcism
    Exorcism is the religious practice of evicting demons or other spiritual entities from a person or place which they are believed to have possessed...

    .

1870s

  • 1870 – Jean-Martin Charcot
    Jean-Martin Charcot
    Jean-Martin Charcot was a French neurologist and professor of anatomical pathology. He is known as "the founder of modern neurology" and is "associated with at least 15 medical eponyms", including Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis...

     began clinical research into hysteria (conversion disorder
    Conversion disorder
    Conversion disorder is a condition in which patients present with neurological symptoms such as numbness, blindness, paralysis, or fits without a neurological cause. It is thought that these problems arise in response to difficulties in the patient's life, and conversion is considered a psychiatric...

    ) at the Salpêtrière Hospital in Paris.

1880s

  • 1884 – Jean-Martin Charcot
    Jean-Martin Charcot
    Jean-Martin Charcot was a French neurologist and professor of anatomical pathology. He is known as "the founder of modern neurology" and is "associated with at least 15 medical eponyms", including Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis...

     explained demonic possession as a form of hysteria (conversion disorder
    Conversion disorder
    Conversion disorder is a condition in which patients present with neurological symptoms such as numbness, blindness, paralysis, or fits without a neurological cause. It is thought that these problems arise in response to difficulties in the patient's life, and conversion is considered a psychiatric...

    ), to be treated with hypnotherapy
    Hypnotherapy
    Hypnotherapy is a therapy that is undertaken with a subject in hypnosis.The word "hypnosis" is an abbreviation of James Braid's term "neuro-hypnotism", meaning "sleep of the nervous system"....

    .
  • 1885 – Pierre Janet
    Pierre Janet
    Pierre Marie Félix Janet was a pioneering French psychologist, philosopher and psychotherapist in the field of dissociation and traumatic memory....

     began therapeutic practice and research in Le Havre
    Le Havre
    Le Havre is a city in the Seine-Maritime department of the Haute-Normandie region in France. It is situated in north-western France, on the right bank of the mouth of the river Seine on the English Channel. Le Havre is the most populous commune in the Haute-Normandie region, although the total...

    .
  • 1886 – Sigmund Freud
    Sigmund Freud
    Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

     began therapeutic practice and research in Vienna
    Vienna
    Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

    .

1890s

  • 1892 – Foundation of the American Psychological Association
    American Psychological Association
    The American Psychological Association is the largest scientific and professional organization of psychologists in the United States. It is the world's largest association of psychologists with around 154,000 members including scientists, educators, clinicians, consultants and students. The APA...

     (APA), headed by G. Stanley Hall
    G. Stanley Hall
    Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

    .
  • 1896 – Development of the first psychological clinic at the University of Pennsylvania
    University of Pennsylvania
    The University of Pennsylvania is a private, Ivy League university located in Philadelphia, Pennsylvania, United States. Penn is the fourth-oldest institution of higher education in the United States,Penn is the fourth-oldest using the founding dates claimed by each institution...

    , marking the birth of clinical psychology
    Clinical psychology
    Clinical psychology is an integration of science, theory and clinical knowledge for the purpose of understanding, preventing, and relieving psychologically-based distress or dysfunction and to promote subjective well-being and personal development...

    .
  • 1898 – Boris Sidis
    Boris Sidis
    Boris Sidis, Ph.D., M.D. was a Ukrainian Jewish psychologist, physician, psychiatrist, and philosopher of education. Sidis founded the New York State Psychopathic Institute and the Journal of Abnormal Psychology. He was the father of the child prodigy William James Sidis...

     publishes The Psychology of Suggestion: A Research into the Subconscious Nature of Man and Society.

1900s

  • 1900 – Sigmund Freud published Interpretation of Dreams, marking the beginning of Psychoanalytic Thought.
  • 1906 – The Journal of Abnormal Psychology
    Journal of Abnormal Psychology
    The Journal of Abnormal Psychology is a scientific journal published by the American Psychological Association.It was previously titled Journal of Abnormal & Social Psychology. It publishes basic research as well as theoretical articles in the general field of abnormal behavior, its determinants,...

     founded by Morton Prince
    Morton Prince
    Morton Henry Prince was an American physician who specialized in neurology and abnormal psychology, and was a leading force in establishing psychology as a clinical and academic discipline. He was part of a handful of men who disseminated European ideas about psychopathology, especially in...

     for which Boris Sidis
    Boris Sidis
    Boris Sidis, Ph.D., M.D. was a Ukrainian Jewish psychologist, physician, psychiatrist, and philosopher of education. Sidis founded the New York State Psychopathic Institute and the Journal of Abnormal Psychology. He was the father of the child prodigy William James Sidis...

     was an associate editor and significant contributor.

1910s

  • 1910 – Boris Sidis
    Boris Sidis
    Boris Sidis, Ph.D., M.D. was a Ukrainian Jewish psychologist, physician, psychiatrist, and philosopher of education. Sidis founded the New York State Psychopathic Institute and the Journal of Abnormal Psychology. He was the father of the child prodigy William James Sidis...

     opens 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
    Alfred Adler
    Alfred Adler was an Austrian medical doctor, psychotherapist, and founder of the school of individual psychology. In collaboration with Sigmund Freud and a small group of Freud's colleagues, Adler was among the co-founders of the psychoanalytic movement as a core member of the Vienna...

     left Freud's Psychoanalytic Group to form his own school of thought, Individual Psychology
    Individual psychology
    Individual psychology is a term used specifically to refer to the psychological method or science founded by the Viennese psychiatrist Alfred Adler...

    , accusing Freud of overemphasizing sexuality and basing his theory on his own childhood.
  • 1913 – Carl Jung
    Carl Jung
    Carl Gustav Jung was a Swiss psychiatrist and the founder of Analytical Psychology. Jung is considered the first modern psychiatrist to view the human psyche as "by nature religious" and make it the focus of exploration. Jung is one of the best known researchers in the field of dream analysis and...

     departed from Freudian views and developed his own theories citing Freud's inability to acknowledge religion and spirituality
    Spirituality
    Spirituality can refer to an ultimate or an alleged immaterial reality; an inner path enabling a person to discover the essence of his/her being; or the “deepest values and meanings by which people live.” Spiritual practices, including meditation, prayer and contemplation, are intended to develop...

    . His new school of thought became known as Analytical Psychology
    Analytical psychology
    Analytical psychology is the school of psychology originating from the ideas of Swiss psychiatrist Carl Jung. His theoretical orientation has been advanced by his students and other thinkers who followed in his tradition. Though they share similarities, analytical psychology is distinct from...

    .
  • 1913 – Jacob L. Moreno
    Jacob L. Moreno
    Jacob Levy Moreno was a Jewish Romanian-born Austrian-American leading psychiatrist and psychosociologist, thinker and educator, the founder of psychodrama, and the foremost pioneer of group psychotherapy...

     applied Group Psychotherapy
    Group therapy
    Group psychotherapy or group therapy is a form of psychotherapy in which one or more therapists treat a small group of clients together as a group...

     methods in Vienna. His methods, which emphasized spontaneity and interaction, later became known as Psychodrama
    Psychodrama
    Psychodrama is a method of psychotherapy in which clients utilize spontaneous dramatization, role playing and dramatic self-presentation to investigate and gain insight into their lives. Developed by Jacob L. Moreno, M.D. psychodrama includes elements of theater, often conducted on a stage where...

     and Sociometry
    Sociometry
    Sociometry is a quantitative method for measuring social relationships. It was developed by psychotherapist Jacob L. Moreno in his studies of the relationship between social structures and psychological well-being....

    .
  • 1914 – Boris Sidis
    Boris Sidis
    Boris Sidis, Ph.D., M.D. was a Ukrainian Jewish psychologist, physician, psychiatrist, and philosopher of education. Sidis founded the New York State Psychopathic Institute and the Journal of Abnormal Psychology. He was the father of the child prodigy William James Sidis...

     publishes The Foundations of Normal and Abnormal Psychology where he provides the scientific foundation for the field of psychology, and details his theory of the moment-consciousness.

1920s

  • 1921 – Jacob L. Moreno
    Jacob L. Moreno
    Jacob Levy Moreno was a Jewish Romanian-born Austrian-American leading psychiatrist and psychosociologist, thinker and educator, the founder of psychodrama, and the foremost pioneer of group psychotherapy...

     conducted the first large scale public Psychodrama
    Psychodrama
    Psychodrama is a method of psychotherapy in which clients utilize spontaneous dramatization, role playing and dramatic self-presentation to investigate and gain insight into their lives. Developed by Jacob L. Moreno, M.D. psychodrama includes elements of theater, often conducted on a stage where...

     session at the Komoedienhaus, Vienna. He moved to New York in 1925.
  • 1922 – Boris Sidis
    Boris Sidis
    Boris Sidis, Ph.D., M.D. was a Ukrainian Jewish psychologist, physician, psychiatrist, and philosopher of education. Sidis founded the New York State Psychopathic Institute and the Journal of Abnormal Psychology. He was the father of the child prodigy William James Sidis...

     publishes Nervous Ills: Their Cause and a Cure, a popularization of his work concerning the subconscious and the treatment of psychopathic disease.

1930s

  • 1933 – Wilhelm Reich
    Wilhelm Reich
    Wilhelm Reich was an Austrian-American psychiatrist and psychoanalyst, known as one of the most radical figures in the history of psychiatry...

      published his influential book Character Analysis.
  • 1936 – Karen Horney
    Karen Horney
    Karen Horney born Danielsen was a German-American psychoanalyst. Her theories questioned some traditional Freudian views, particularly his theory of sexuality, as well as the instinct orientation of psychoanalysis and its genetic psychology...

     began her critique of Freudian psychoanalytic theory with the publication of Feminine Psychology.

1940s

  • 1942 – Carl Rogers
    Carl Rogers
    Carl Ransom Rogers was an influential American psychologist and among the founders of the humanistic approach to psychology...

     published Counseling and Psychotherapy, suggesting that respect and a non-judgmental approach to therapy is the foundation for effective treatment of mental health
    Mental health
    Mental health describes either a level of cognitive or emotional well-being or an absence of a mental disorder. From perspectives of the discipline of positive psychology or holism mental health may include an individual's ability to enjoy life and procure a balance between life activities and...

     issues.
  • 1943 – Albert Hofmann
    Albert Hofmann
    Albert Hofmann was a Swiss scientist known best for being the first person to synthesize, ingest and learn of the psychedelic effects of lysergic acid diethylamide . He authored more than 100 scientific articles and a number of books, including LSD: My Problem Child...

     writes his first report about the hallucinogenic properties of LSD, which he first synthesized in 1938. LSD was practiced as a therapeutic drug throughout the 1950s and 1960s.
  • 1945 – The Journal of Clinical Psychology founded.
  • 1949 – Boulder Conference outlined the scientist-practitioner model of clinical psychology
    Scientist-Practitioner Model of Clinical Psychology
    The scientist–practitioner model, also called the Boulder model, is a training model for graduate programs that focuses on creating a foundation of research and scientific practice. It was developed primarily to train clinical psychologist members of American Psychological Association but has been...

    , looking at the Master's degree versus PhD used by medical providers and researchers, respectively.

1950s

  • 1951 – Carl Rogers published his major work, Client-Centered Therapy.
  • 1951 The seminal work of "Gestalt Therapy
    Gestalt therapy
    Gestalt therapy is an existential/experiential form of psychotherapy that emphasizes personal responsibility, and that focuses upon the individual's experience in the present moment, the therapist-client relationship, the environmental and social contexts of a person's life, and the self-regulating...

    : Excitement and Growth in the Human Personality"
    is published, co-authored by Fritz Perls
    Fritz Perls
    Friedrich Salomon Perls , better known as Fritz Perls, was a noted German-born psychiatrist and psychotherapist of Jewish descent....

    , Paul Goodman
    Paul Goodman
    Paul Goodman may refer to:*Paul Goodman , British politician*Paul Goodman , American ice hockey player*Paul Goodman , Grammy Award-winning sound engineer...

    , and Ralph Hefferline.
  • 1952 – The Diagnostic and Statistical Manual of Mental Disorders
    Diagnostic and Statistical Manual of Mental Disorders
    The Diagnostic and Statistical Manual of Mental Disorders is published by the American Psychiatric Association and provides a common language and standard criteria for the classification of mental disorders...

     (DSM) was published by The American Psychiatric Association marking the beginning of modern mental illness classification.
  • 1953 – B.F. Skinner outlined behavioral therapy, lending support for behavioral psychology via research in the literature.
  • 1953 – Code of Ethics for Psychologists developed by the American Psychological Association.
  • 1954 – Abraham Maslow
    Abraham Maslow
    Abraham Harold Maslow was an American professor of psychology at Brandeis University, Brooklyn College, New School for Social Research and Columbia University who created Maslow's hierarchy of needs...

     helped to found Humanistic psychology
    Humanistic psychology
    Humanistic psychology is a psychological perspective which rose to prominence in the mid-20th century, drawing on the work of early pioneers like Carl Rogers and the philosophies of existentialism and phenomenology...

     and later developed his famous Hierarchy of Needs
    Maslow's hierarchy of needs
    Maslow's hierarchy of needs is a theory in psychology, proposed by Abraham Maslow in his 1943 paper A Theory of Human Motivation. Maslow subsequently extended the idea to include his observations of humans' innate curiosity...

    .
  • 1957 – Albert Ellis began teaching the methods of Rational Emotive Behavior Therapy
    Rational emotive behavior therapy
    Rational emotive behavior therapy , previously called rational therapy and rational emotive therapy, is a comprehensive, active-directive, philosophically and empirically based psychotherapy which focuses on resolving emotional and behavioral problems and disturbances and enabling people to lead...

    .

1960s

  • 1960 – Thomas Szasz
    Thomas Szasz
    Thomas Stephen Szasz is a psychiatrist and academic. Since 1990 he has been Professor Emeritus of Psychiatry at the State University of New York Health Science Center in Syracuse, New York. He is a well-known social critic of the moral and scientific foundations of psychiatry, and of the social...

     inaugurated the anti-psychiatry
    Anti-psychiatry
    Anti-psychiatry is a configuration of groups and theoretical constructs that emerged in the 1960s, and questioned the fundamental assumptions and practices of psychiatry, such as its claim that it achieves universal, scientific objectivity. Its igniting influences were Michel Foucault, R.D. Laing,...

     movement with the publication of his book, The Myth of Mental Illness
    The Myth of Mental Illness
    The Myth Of Mental Illness: Foundations of a Theory of Personal Conduct is a controversial book by Thomas Szasz and published in 1961. It is highly influential in the anti-psychiatry movement...

    .
  • 1960 – R. D. Laing
    Ronald David Laing
    Ronald David Laing was a Scottish psychiatrist who wrote extensively on mental illnessin particular, the experience of psychosis...

     published The Divided Self which saw mental illness as an expression or communication of the individual and so represented valid descriptions of lived experience or reality rather than as symptoms of some separate or underlying disorder.
  • 1962 – The Esalen Institute
    Esalen Institute
    Esalen Institute is a residential community and retreat in Big Sur, California, which focuses upon humanistic alternative education. Esalen is a nonprofit organization devoted to activites such as meditation, massage, Gestalt, yoga, psychology, ecology, and spirituality...

     founded at Big Sur California , acting as a focus for the development of many branches of Humanistic psychology
    Humanistic psychology
    Humanistic psychology is a psychological perspective which rose to prominence in the mid-20th century, drawing on the work of early pioneers like Carl Rogers and the philosophies of existentialism and phenomenology...

    .
  • 1967 – Aaron Beck published a psychological model of depression, suggesting that thoughts play a significant role in the development and maintenance of depression.
  • 1968 – DSM II published by the American Psychiatric Association.
  • 1968 – First Doctor of Psychology
    Doctor of Psychology
    The Doctor of Psychology degree is a professional doctorate earned through one of two established training models for clinical psychology...

     (Psy.D.) professional degree program in Clinical Psychology established in the Department of Psychology at the University of Illinois at Urbana-Champaign
    University of Illinois at Urbana-Champaign
    The University of Illinois at Urbana–Champaign is a large public research-intensive university in the state of Illinois, United States. It is the flagship campus of the University of Illinois system...

    .
  • 1969 – California School of Professional Psychology
    California School of Professional Psychology
    The California School of Professional Psychology , was founded by the California Psychological Association in 1969. It is part of Alliant International University.The school has trained approximately half of the licensed psychologists in California...

     established as first freestanding school of professional psychology.
  • 1969 – Joseph Wolpe
    Joseph Wolpe
    Joseph Wolpe was born on April 20, 1915, in Johannesburg, South Africa, and died on December 4, 1997, from lung cancer. He is one of the most influential figures in behavior therapy....

     published The Practice of Behavior Therapy.

1970s

  • 1970 – Arthur Janov
    Arthur Janov
    Arthur Janov is an American psychologist, psychotherapist, and the creator of primal therapy, a treatment for mental illness that involves repeatedly descending into, feeling, and expressing long-repressed childhood pain. Janov directs a psychotherapy institute called the Primal Center in Santa...

     published his book The Primal Scream
    The Primal Scream
    The Primal Scream is a book by Arthur Janov Ph. D, the inventor of Primal Therapy. It is subtitled Primal Therapy: The Cure for Neurosis. The book describes the experiences Arthur Janov had with 63 patients during his first 18 months discovering and practicing Primal Therapy...

    , which outlined his theory of the trauma-based Primal therapy
    Primal therapy
    Primal therapy is a trauma-based psychotherapy created by Arthur Janov, who argues that neurosis is caused by the repressed pain of childhood trauma. Janov argues that repressed pain can be sequentially brought to conscious awareness and resolved through re-experiencing the incident and fully...

    .
  • 1971 – Vladimir Bukovsky
    Vladimir Bukovsky
    Vladimir Konstantinovich Bukovsky is a leading member of the dissident movement of the 1960s and 1970s, writer, neurophysiologist, and political activist....

     documented the psychiatric imprisonment of political prisoners in the USSR.

1990s

  • 1990 – Michael White
    Michael White (psychotherapist)
    Michael White was an Australian social worker and family therapist.He is known as the founder of narrative therapy, and for his significant contribution to psychotherapy and family therapy, which have been a source of techniques adopted by other approaches.-Biography:Michael Kingsley White was...

     and David Epston
    David Epston
    David Epston is a New Zealand therapist, co-director of the Family Therapy Centre in Auckland, New Zealand, and Visiting Professor at the John F. Kennedy University...

     publish Narrative Means to Therapeutic Ends, the first major text in what later comes to be known as narrative therapy
    Narrative therapy
    Narrative Therapy is a form of psychotherapy using narrative. It was initially developed during the 1970s and 1980s, largely by Australian Michael White and his friend and colleague, David Epston, of New Zealand....

    .
  • 1994 – DSM IV (The Diagnostic and Statistical Manual of Mental Disorders) published by the American Psychiatric Association.

2000s

  • 2000 – The DSM-IV-TR, was published in May 2000 in order to correct several errors in DSM-IV, and to update and change diagnostic codes to reflect the ICD-9-CM
    ICD
    The International Statistical Classification of Diseases and Related Health Problems is a medical classification that provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or disease...

    coding system.
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