History of psychology

Transition to contemporary psychology[edit]
Also influential on the emerging discipline of psychology were debates surrounding the efficacy of Mesmerism (a precursor to hypnosis) and the value of phrenology. The former was developed in the 1770s by Austrian physician Franz Mesmer (1734–1815) who claimed to use the power of gravity, and later of "animal magnetism", to cure various physical and mental ills. As Mesmer and his treatment became increasingly fashionable in both Vienna and Paris, it also began to come under the scrutiny of suspicious officials. In 1784, an investigation was commissioned in Paris by King Louis XVI which included American ambassador Benjamin Franklin, chemist Antoine Lavoisier and physician Joseph-Ignace Guillotin (later the popularizer of the guillotine). They concluded that Mesmer's method was useless. Abbé Faria, an Indo-Portuguese priest, revived public attention in animal magnetism. Unlike Mesmer, Faria claimed that the effect was 'generated from within the mind’ by the power of expectancy and cooperation of the patient. Although disputed, the "magnetic" tradition continued among Mesmer's students and others, resurfacing in England in the 19th century in the work of the physician John Elliotson (1791–1868), and the surgeons James Esdaile (1808–1859), and James Braid (1795–1860) (who reconceptualized it as property of the subject's mind rather than a "power" of the Mesmerist's, and relabeled it "hypnotism"). Mesmerism also continued to have a strong social (if not medical) following in England through the 19th century (see Winter, 1998). Faria's approach was significantly extended by the clinical and theoretical work of Ambroise-Auguste Liébeault and Hippolyte Bernheim of the Nancy School. Faria's theoretical position, and the subsequent experiences of those in the Nancy School made significant contributions to the later autosuggestion techniques of Émile Coué.^[52] It was adopted for the treatment of hysteria by the director of Paris's Salpêtrière Hospital, Jean-Martin Charcot (1825–1893).
Phrenology began as "organology", a theory of brain structure developed by the German physician, Franz Joseph Gall (1758–1828). Gall argued that the brain is divided into a large number of functional "organs", each responsible for particular human mental abilities and dispositions – hope, love, spirituality, greed, language, the abilities to detect the size, form, and color of objects, etc. He argued that the larger each of these organs are, the greater the power of the corresponding mental trait. Further, he argued that one could detect the sizes of the organs in a given individual by feeling the surface of that person's skull. Gall's ultra-localizationist position with respect to the brain was soon attacked, most notably by French anatomist Pierre Flourens (1794–1867), who conducted ablation studies (on chickens) which purported to demonstrate little or no cerebral localization of function. Although Gall had been a serious (if misguided) researcher, his theory was taken by his assistant, Johann Gaspar Spurzheim (1776–1832), and developed into the profitable, popular enterprise of phrenology, which soon spawned, especially in Britain, a thriving industry of independent practitioners. In the hands of Scottish religious leader George Combe (1788–1858) (whose book The Constitution of Man was one of the best-sellers of the century), phrenology became strongly associated with political reform movements and egalitarian principles (see, e.g., Shapin, 1975; but also see van Wyhe, 2004). Spurzheim soon spread phrenology to America as well, where itinerant practical phrenologists assessed the mental well-being of willing customers (see Sokal, 2001; Thompson 2021).
The development of modern psychology was closely linked to psychiatry in the eighteenth and nineteenth centuries (see History of psychiatry), when the treatment of the mentally ill in hospices was revolutionized after Europeans first considered their pathological conditions. In fact, there was no distinction between the two areas in psychotherapeutic practice, in an era when there was still no drug treatment (of the so-called psychopharmacologicy revolution from 1950) for mental disorders, and its early theorists and pioneering clinical psychologists generally had medical background. The first to implement in the Western a humanitarian and scientific treatment of mental health, based on Enlightenment ideas, were the French alienists, who developed the empirical observation of psychopathology, describing the clinical conditions, their physiological relationships and classifying them. It was called the rationalist-empirical school, which most known exponents were Pinel, Esquirol, Falret, Morel and Magnan. In the late nineteenth century, the French current was gradually overcome by the German field of study. At first, the German school was influenced by romantic ideals and gave rise to a line of mental process speculators, based more on empathy than reason. They became known as Psychiker, mentalists or psychologists, with different currents being highlighted by Reil (creator of the word "psychiatry"), Heinroth (first to use the term "psychosomatic") Ideler and Carus. In the middle of the century, a "somatic reaction" (somatiker) formed against the speculative doctrines of mentalism, and it was based on neuroanatomy and neuropathology. In it, those who made important contributions to the psychopathological classification were Griesinger, Westphal, Krafft-Ebbing and Kahlbaum, which, in their turn, would influence Wernicke and Meynert. Kraepelin revolutionized as the first to define the diagnostic aspects of mental disorders in syndromes, and the work of psychological classification was followed to the contemporary field by contributions from Schneider, Kretschmer, Leonhard, and Jaspers. In Great Britain, there stand out in the nineteenth century Alexander Bain founder of the first journal of psychology, Mind, and writer of reference books on the subject at the time, such as Mental Science: The Compendium of Psychology, and the History of Philosophy (1868), and Henry Maudsley. In Switzerland, Bleuler coined the terms "depth psychology", "schizophrenia", "schizoid" and "autism". In the United States, the Swiss psychiatrist Adolf Meyer maintained that the patient should be regarded as an integrated "psychobiological" whole, emphasizing psychosocial factors, concepts that propitiated the so-called psychosomatic medicine.^[53][54][55]
Emergence of German experimental psychology[edit]
Until the middle of the 19th century, psychology was widely regarded as a branch of philosophy. Whether it could become an independent scientific discipline was questioned already earlier on: Immanuel Kant (1724–1804) declared in his Metaphysical Foundations of Natural Science (1786) that psychology might perhaps never become a "proper" natural science because its phenomena cannot be quantified, among other reasons.^[56] Kant proposed an alternative conception of an empirical investigation of human thought, feeling, desire, and action, and lectured on these topics for over twenty years (1772/73-1795/96). His Anthropology from a Pragmatic Point of View (1798), which resulted from these lectures, looks like an empirical psychology in many respects.^[57]
Johann Friedrich Herbart (1776–1841) took issue with what he viewed as Kant's conclusion and attempted to develop a mathematical basis for a scientific psychology. Although he was unable to empirically realize the terms of his psychological theory, his efforts did lead scientists such as Ernst Heinrich Weber (1795–1878) and Gustav Theodor Fechner (1801–1887) to attempt to measure the mathematical relationships between the physical magnitudes of external stimuli and the psychological intensities of the resulting sensations. Fechner (1860) is the originator of the term psychophysics.
Meanwhile, individual differences in reaction time had become a critical issue in the field of astronomy, under the name of the "personal equation". Early researches by Friedrich Wilhelm Bessel (1784–1846) in Königsberg and Adolf Hirsch led to the development of a highly precise chronoscope by Matthäus Hipp that, in turn, was based on a design by Charles Wheatstone for a device that measured the speed of artillery shells (Edgell & Symes, 1906). Other timing instruments were borrowed from physiology (e.g., Carl Ludwig's kymograph) and adapted for use by the Utrecht ophthalmologist Franciscus Donders (1818–1899) and his student Johan Jacob de Jaager in measuring the duration of simple mental decisions.
The 19th century was also the period in which physiology, including neurophysiology, professionalized and saw some of its most significant discoveries. Among its leaders were Charles Bell (1774–1843) and François Magendie (1783–1855) who independently discovered the distinction between sensory and motor nerves in the spinal column, Johannes Müller (1801–1855) who proposed the doctrine of specific nerve energies, Emil du Bois-Reymond (1818–1896) who studied the electrical basis of muscle contraction, Pierre Paul Broca (1824–1880) and Carl Wernicke (1848–1905) who identified areas of the brain responsible for different aspects of language, as well as Gustav Fritsch (1837–1927), Eduard Hitzig (1839–1907), and David Ferrier (1843–1924) who localized sensory and motor areas of the brain. One of the principal founders of experimental physiology, Hermann Helmholtz (1821–1894), conducted studies of a wide range of topics that would later be of interest to psychologists – the speed of neural transmission, the natures of sound and color, and of our perceptions of them, etc. In the 1860s, while he held a position in Heidelberg, Helmholtz engaged as an assistant a young physician named Wilhelm Wundt. Wundt employed the equipment of the physiology laboratory – chronoscope, kymograph, and various peripheral devices – to address more complicated psychological questions than had, until then, been investigated experimentally. In particular he was interested in the nature of apperception – the point at which a perception occupies the central focus of conscious awareness.
In 1864 Wundt took up a professorship in Zürich, where he published his landmark textbook, Grundzüge der physiologischen Psychologie (Principles of Physiological Psychology, 1874). Moving to a more prestigious professorship in Leipzig in 1875, Wundt founded a laboratory specifically dedicated to original research in experimental psychology in 1879, the first laboratory of its kind in the world. In 1883, he launched a journal in which to publish the results of his, and his students', research, Philosophische Studien (Philosophical Studies) (For more on Wundt, see, e.g., Bringmann & Tweney, 1980; Rieber & Robinson, 2001). Wundt attracted a large number of students not only from Germany, but also from abroad. Among his most influential American students were G. Stanley Hall (who had already obtained a PhD from Harvard under the supervision of William James), James McKeen Cattell (who was Wundt's first assistant), and Frank Angell (who founded laboratories at both Cornell and Stanford). The most influential British student was Edward Bradford Titchener (who later became professor at Cornell).
Experimental psychology laboratories were soon also established at Berlin by Carl Stumpf (1848–1936) and at Göttingen by Georg Elias Müller (1850–1934). Another major German experimental psychologist of the era, though he did not direct his own research institute, was Hermann Ebbinghaus (1850–1909).
Psychoanalysis