Autism spectrum disorder (ASD), also known as autism, is a common, highly heritable and heterogeneous neurodevelopmental disorder that has underlying cognitive features and commonly co-occurs with other conditions. The behaviours, strengths and challenges
of people with autism have attracted the attention of scientists and clinicians for at least 500 years...
The first recognised description of autism is, if I’m correct, from 1943 by Kanner, so hardly 500 years ago. It could be that some scholars had been considering the symptomatogy of autism earlier, though didn’t leave a report behind.
Yes - what’s the question?
May be cluster analysis or Factor analysis should help us as there are multiple facets of Autism and diverse aetiologies.
It is defined by the Fifth Diagnostic and Statistical Manual of Mental Disorders (Association, 2013): It is a neurodevelopmental disorder that appears in early childhood and is characterized by a constant deficit in social and emotional interaction and social communication, as well as a deficit in developing and maintaining relationships, stereotyping in behavior and insistence on symmetry and inflexibility, Limited interests, unusual interaction with sensory afferents, and unusual interest in various sensory aspects.
Indeed, the concept of "Autism", which was a true "mixed bag", required that it be redefined and, therefore, the DSM-5 of the APA discontinued and redefined it under the common framework of Autism Spectrum Disorders ( ASD), eliminating from the previous classification, for example, Rett Syndrome, which has nothing to do with it. As ASD is a general concept, similar to what happens with Cancer, also as an example, it brings together pictures of different etiology, clinical symptoms, symptoms, etc. but they all have a common denominator:
They are a developmental disability that can cause significant social, communication, and behavioral problems. Often, there are no clues to the appearance of people with ASD that differentiate them from other people, but it is possible for those with an ASD to communicate, interact, behave, and learn differently from other people. The learning, thinking, and problem-solving skills of people with ASD can vary; there are from people with very high levels of ability (gifted in English) and people who have many difficulties. Some need a lot of help in daily life, while others need less.
Currently, the diagnosis of ASD includes many conditions that used to be diagnosed separately and include autistic disorder, pervasive developmental disorder not otherwise specified (PDD-NOS), and Asperger syndrome.
People with an ASD often have problems with social, emotional, and communication skills. They may repeat certain behaviors or may not want changes in their daily activities. Many people with ASD also have different ways of learning, paying attention, or reacting to things. Some of the signs begin during early childhood and usually last a lifetime.
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