Asperger syndrome (AS), also known as Asperger's, is a neurodevelopmental condition characterized by significant difficulties in social interaction and nonverbal communication, along with restricted and repetitive patterns of behavior and interests. The syndrome is no longer recognized as a diagnosis in itself, having been merged with other conditions into autism spectrum disorder (ASD). It was considered to differ from other diagnoses that were merged into ASD by relatively unimpaired spoken language and intelligence.
Lorna Gladys Wing was an English psychiatrist. She was a pioneer in the field of childhood developmental disorders, who advanced understanding of autism worldwide, introduced the term Asperger syndrome in 1976 and was involved in founding the National Autistic Society (NAS) in the UK.
Autism spectrum disorders (ASD) are neurodevelopmental disorders that begin in early childhood, persist throughout adulthood, and affect three crucial areas of development: communication, social interaction and restricted patterns of behavior. There are many conditions comorbid to autism spectrum disorders such as attention-deficit hyperactivity disorder and epilepsy.
Sir Simon Philip Baron-Cohen is a British clinical psychologist and professor of developmental psychopathology at the University of Cambridge. He is the director of the university's Autism Research Centre and a Fellow of Trinity College. In 1985, Baron-Cohen formulated the mindblindness theory of autism, the evidence for which he collated and published in 1995. In 1997, he formulated the foetal sex steroid theory of autism, the key test of which was published in 2015.
Neurodiversity is a proposed framework that argues there is intrinsic diversity in human brain function and cognition, and that certain things currently classified as mental disorders are differences and disabilities but are not necessarily pathological. The framework grew out of the autism rights movement and builds on the social model of disability, arguing that disability partly arises from societal barriers, rather than attributing disability purely to inherent deficits. It instead situates human cognitive variation in the context of biodiversity and the politics of minority groups. Some neurodiversity advocates and researchers argue that the neurodiversity paradigm is the middle ground between strong medical model and strong social model.
Nonverbal learning disability (NVLD) is proposed category of neurodevelopmental disorder characterized by core deficits in visual-spatial processing and a significant discrepancy between verbal and nonverbal intelligence. A review of papers found that proposed diagnostic criteria were inconsistent. Proposed additional diagnostic criteria include intact verbal intelligence, and deficits in the following: visuoconstruction abilities, speech prosody, fine-motor coordination, mathematical reasoning, visuospatial memory and social skills. NVLD is not recognised by the DSM-5 and is not clinically distinct from learning disorder.
The autism-spectrum quotient (AQ) is a questionnaire published in 2001 by Simon Baron-Cohen and his colleagues at the Autism Research Centre in Cambridge, UK. Consisting of fifty questions, it aims to investigate whether adults of average intelligence have symptoms of autism spectrum conditions. More recently, versions of the AQ for children and adolescents have also been published.
The empathising–systemising (E–S) theory is a theory on the psychological basis of autism and male–female neurological differences originally put forward by English clinical psychologist Simon Baron-Cohen. It classifies individuals based on abilities in empathic thinking (E) and systematic thinking (S). It measures skills using an Empathy Quotient (EQ) and Systemising Quotient (SQ) and attempts to explain the social and communication symptoms in autism spectrum disorders as deficits and delays in empathy combined with intact or superior systemising.
Dame Uta Frith is a German-British developmental psychologist at the Institute of Cognitive Neuroscience at University College London. She has pioneered much of the current research into autism and dyslexia. She has written several books on these subjects, arguing for autism to be seen as a mental condition rather than as one caused by parenting. Her Autism: Explaining the Enigma introduces the cognitive neuroscience of autism. She is credited with creating the Sally–Anne test along with fellow scientists Alan Leslie and Simon Baron-Cohen. She also pioneered the work on child dyslexia. Among students she has mentored are Tony Attwood, Maggie Snowling, Simon Baron-Cohen and Francesca Happé.
Asperger syndrome (AS) was formerly a separate diagnosis under autism spectrum disorder. Under the DSM-5 and ICD-11, patients formerly diagnosable with Asperger syndrome are diagnosable with Autism Spectrum Disorder. The term is considered offensive by some autistic individuals. It was named after Hans Asperger (1906–80), who was an Austrian psychiatrist and pediatrician. An English psychiatrist, Lorna Wing, popularized the term "Asperger's syndrome" in a 1981 publication; the first book in English on Asperger syndrome was written by Uta Frith in 1991 and the condition was subsequently recognized in formal diagnostic manuals later in the 1990s.
Pathological demand avoidance (PDA) or extreme demand avoidance (EDA) is a proposed disorder and sub-type of autism spectrum disorder, defined by characteristics such as a greater than typical refusal to comply with requests or expectations and extreme efforts to avoid the social demand. Any expectation, even familiar, routine activities for highly desired activities, such as getting ready to leave home to visit a playground, can trigger avoidant behavior, and if the demand cannot be avoided, a panic attack or a meltdown may ensue.
Classic autism, also known as childhood autism, autistic disorder, (early) infantile autism, infantile psychosis, Kanner's autism,Kanner's syndrome, or just autism, is a neurodevelopmental condition first described by Leo Kanner in 1943. It is characterized by atypical and impaired development in social interaction and communication as well as restricted, repetitive behaviors, activities, and interests. These symptoms first appear in early childhood and persist throughout life.
Several factors complicate the diagnosis of Asperger syndrome (AS), an autism spectrum disorder (ASD). Like other ASD forms, Asperger syndrome is characterized by impairment in social interaction accompanied by restricted and repetitive interests and behavior; it differs from the other ASDs by having no general delay in language or cognitive development. Problems in diagnosis include disagreement among diagnostic criteria, the controversy over the distinction between AS and other ASD forms or even whether AS exists as a separate syndrome, and over- and under-diagnosis for non-technical reasons. As with other ASD forms, early diagnosis is important, and differential diagnosis must consider several other conditions.
Autism, formally called autism spectrum disorder (ASD) or autism spectrum condition (ASC), is a neurodevelopmental disorder characterized by deficits in social communication and social interaction, and repetitive or restricted patterns of behaviors, interests, or activities, which can include hyper- and hyporeactivity to sensory input. Autism is a spectrum disorder, meaning that it can manifest very differently in each person. For example, some are nonspeaking, while others have proficient spoken language. Because of this, there is wide variation in the support needs of people across the autism spectrum.
Fred Robert Volkmar is a psychiatrist, psychologist, and the Irving B. Harris Professor of Child Psychiatry, Pediatrics, and Psychology at the Yale School of Medicine. From 2006 to 2014, he was the director of the Yale Child Study Center and the head of child psychiatry at Yale New Haven Hospital. Prior to these appointments, he was the director of the Autism Program at the Yale Child Study Center since 1983.
Francesca Gabrielle Elizabeth Happé is Professor of Cognitive Neuroscience and Director of the MRC Social, Genetic and Developmental Psychiatry Centre at the Institute of Psychiatry, Psychology and Neuroscience, King's College London. Her research concerns autism spectrum conditions, specifically the understanding social cognitive processes in these conditions.
The history of autism spans over a century, autism has been subject to varying treatments, being pathologized or being viewed as a beneficial part of human neurodiversity. The understanding of autism has been shaped by cultural, scientific, and societal factors throughout history, and its perception and treatment change over time as scientific understanding of autism develops.
Sex and gender differences in autism exist regarding prevalence, presentation, and diagnosis.
Edward Ross Ritvo was an American psychiatrist known for his research on genetic components of autism. He was a professor emeritus of UCLA's Neuropsychiatric Institute.
The double empathy problem is a psychological and sociological theory first coined in 2012 by Damian Milton, an autistic autism researcher. This theory proposes that many of the difficulties autistic individuals face when socializing with non-autistic individuals are due, in part, to a lack of mutual understanding between the two groups, meaning that most autistic people struggle to understand and empathize with non-autistic people whereas most non-autistic people also struggle to understand and empathize with autistic people. This lack of understanding may stem from bidirectional differences in communication style, social-cognitive characteristics, and experiences between autistic and non-autistic individuals, but not necessarily an inherent deficiency. Recent studies have shown that most autistic individuals are able to socialize, communicate effectively, empathize well, and display social reciprocity with most other autistic individuals. This theory and subsequent findings challenge the commonly held belief that the social skills of autistic individuals are inherently impaired, as well as the theory of "mind-blindness" proposed by prominent autism researcher Simon Baron-Cohen in the mid-1980s, which suggested that empathy and theory of mind are universally impaired in autistic individuals.
