Since some of the most unlikely people have entered the field of new science, the era of psychological discovery is a time of contemporary, fast-paced tempo. Some people happen by accident due to other scientific disciplines and close cooperation with other people trying to directly create schools of new ways of thinking. At the beginning of its history, and in the majority of its history, discussions on how to define psychology and what should be included occupied the majority of academic papers and private discussions. Thus, in 1894, Lightner Witmer undertook to define an applied psychology that could help children with learning disabilities.
In 1917, established the American Society of Clinical Psychology, this field began to be organized under the name of "clinical psychology". It lasted until 1919, after which the American Psychology Association (founded by G. Stanley Hall in 1992) developed a section on clinical psychology that provided accreditation until 1927. In the next few years, when the slow growth of various unrelated psychology fields was organized as the American Applied Psychology Association in 1930, this will be a major forum for psychologists until World War II APA restructuring Will be. . In 1945, APA founded the clinical psychology department, now known as department 12, and it continues to be the lead organization in this field. Similar organizations are also being developed in psychology associations and associations in other English-speaking countries such as the UK, Canada, Australia, New Zealand.
As the war progressed, the American Clinical Psychology Association (AACP) was founded in 1917, but two years later, the American Psychological Association (APA) launched the Department of Clinical Psychology. Nonetheless, this field has grown over the next few years. In the latter half of 1930, the American Applied Psychology Association was established and undertook the role of APA during the rationalization of the Association during the Second World War (Pilgrim & Cheshire, 2004).
Pediatric psychology was established "lightly" by Lightner Witmer in the early 20th century. However, it was not officially recognized by the American Psychological Association until 1968. Lightner Witmer is often referred to as "father of clinical psychology", and most of the early days cooperated with doctors to find effective ways. A way to manage and / or improve the behavior of children. Pediatric psychology (a combination of medicine and psychology) is considered a field of "slow progress". The purpose of childhood psychology is to promote the health, well-being and development of young people (ie children, adolescents and adolescents) and their families. Evidence based methods are often used to support the process.