Myers & Dewall (2018) identify the beginning of psychology history in 387 B.C.E. when Plato identified the brain to be a centrum for the mental process. At the same time, Aristotle believed the heart to be a core organ that is responsible for mental decisions in 335 B.C.E (Myers & Dewall, 2018). The next important event in modern psychology history is Keplers description of the retina which happened only in 1604. Throughout the late 1600s and 1700s, numerous essays and tractates were published on various findings of human psychology. For instance, Rene Descartes suggested an active interaction between mind and body in his A Discourse on Method (Myers & Dewall, 2018). Later in 1813, the first private psychiatric clinic was opened in Philadelphia (Myers & Dewall, 2018). In 1834, Webers law was formulated in The Sense of Touch by E.H. Weber (Myers & Dewall, 2018). In 1859, Charles Darwin published the central doctrine for all human-related sciences, On the Origin of Species (Myers & Dewall, 2018). In 1879, the first psychology laboratory was opened at the University of Leipzig, Germany, which became a center of attraction for psychologists from all over the world (Myers & Dewall, 2018). The 20th century was crucial for the development of psychology and its establishment. Some of the key events were Sigmund Freuds publication of The Interpreta
tion of Dreams (1900), Pavlovs discoveries on animal conditionings (1904-1905), Leta Stetter Hollingworths The Psychology of Subnormal Children (1920) which was an example of female contribution to the science, Gestalt Psychology(1929) by Kohler, Skinners publication of The Behavior of Organisms (1938), Alfred Kinsey and his supporters issuing Sexual Behavior in the Human Male (1948) and Sexual Behavior in the Human Female (1953) (Myers & Dewall, 2018). Later, other major tractates were published, including The Organization of Behavior: A Neuropsychological Theory by Hebb in 1949, Banduras Principles of Behavior Modification (1969), and Loftuss Eyewitness Testimony (1979). (Myers & Dewall, 2018) Positive psychology introduction by Seligman was one of the most significant trends in the 90s. Currently, psychology continues its development as a science through the adaptation of its new methods. Thus, according to Myers and Dewall (2018), everything psychological is simultaneously biological(n.d.). I tend to agree with this point of view since psychology has originated from a deeper understanding of human biology. As seen from its timeline, Darwins tractate on human evolution influenced the development of psychology in the 19th century. Psychology continuously developed as a branch of biology that connected mind and body into its current form.