Autistic children IQ: cognitive diversity on the spectrum. Dr Nadeem Ghayas
April 14, 2025
Autism spectrum disorder is a neurological and developmental disorder, which affects the way individuals perceive other people, communicate, learn, and behave. Even though autism may be diagnosed at any age; it is a developmental disorder because symptoms normally manifest themselves at the first two years of life. Autistic persons are characterized by numerous symptoms, and they may involve variation in social and communication behaviors, intellectual disabilities, and other physical and mental health disorders. Autistic persons also have diverse health care and basic service needs. It has been observed that access to the services and supports required at an early age can support the health and well-being of people in the long term.
The Intelligence Quotient(IQ) is the score, which is used to determine the comparisons between the thinking and problem-solving abilities of a person with other persons of the same age. Skills that are normally examined by IQ tests include language comprehension, memory, reasoning, and visual thought process. The wechsler intelligence scale which is also known as the WISC, Stanford-Binet Intelligence Scale and the progressive matrices by Raven are some of the widely used IQ tests. These tests were initially developed to test individuals who do not have any developmental problems and as such they might not be able to adequately represent the thinking style of autistic children.
Autism had in the past been associated with intellectual disability. Research literature published in 1960s and 1970s documented reports that a maximum of 75 percent of children with autism had below 70 IQ score that is considered to indicate intellectual disability. This made a number of professionals, teachers and families assume that all children with autism were low IQ children. However, this concept rested on examinations that did not take into account individual approaches through which autistic children acquire and communicate. As an illustration, nonverbal children were not able to respond to questions which were based on verbal communication, and sensory problems such as sound or bright lights usually made these children unable to concentrate. Such tests were also insensitive to other fields where most autistic children excel such as visual thinking or pattern recognition. It consequently led to poor judgment and misunderstanding of many children.
The current studies provide a clearer insight. In a study done by Charman et al. (2011), only a small percentage of about 31 percent of autistic children were found to possess an intellectual disability. Conversely, half of them score averagely and even higher in IQ. Analogous findings were indicated by the Centers of Disease Control and Prevention (CDC, 2020) according to which increasing numbers of autistic children are now being diagnosed as not having intellectual disabilities. The improved testing instruments and increased understanding of the spectrum of autism might be the cause of these changes.
Among the most significant things to realize, is the fact that the abilities of autistic children are usually uneven. It is referred to as a spiky profile, i.e. they could be really good in certain aspects and incompetent in others. In illustration, there are children who possess low verbal IQ (difficulty with language) yet high performance IQ where they will perform satisfactorily when tasks are done in patterns or by solving puzzles. The studies conducted by using nonverbal tests such as Raven Progressive Matrices have demonstrated that, most of autistic children with low score in verbal assessment actually excel in visual assignments (Dawson et al., 2007). This is the reason why multiple tests should be used to realize the potential of the child.
The issue of the performance of an autistic child on an IQ test is influenced by a lot of factors. One of the prominent factors is communication. Not all autistic children can talk or compete age wise, they might not be able to answer questions which need to be spoken to. They are able to comprehend what they are told but fail to articulate what is expected.They also experience sensory problems. It is observed that bright light, background noise, or strangers in the testing rooms can be terrific with autistic children, and this will make them stressed or distracted during the check up. In case a kid feels out of place, then there is a chance that test scores will not be representative of his or her capabilities.
Other tasks involving social and language skills such as comprehension of a short story or recognition of emotions using facial expressions are also considered IQ tests. These tasks may not be compatible as the autistic children have an issue in information processing. Even a child is problem solver or logician, and yet he/she may score low with regard to social based questions. This may create the wrong impression of their overall smartness. This is why numerous specialists suggest applying flexible and individual methods toward testing, that is why the strong and weak points of each child could be taken into account.
The other interesting aspect of autism is that some children have splinter skills or savant abilities. These are extraordinary and rather uncommon abilities in such fields as math, memory, music or art. A child may not be able to get basic tasks accomplished, but can remember unbelievably or be able to play by ear. Others are able to read very early in their lives (a phenomenon called hyperlexia) or today are able to recall calendar dates many years ahead of them. These abilities make us remember that intelligence exists in various forms and it does not always have to be assessed with the help of a standard test (Treffert, 2009).
The implications of learning and thinking about autistic children in the various ways are enormous impacting education and therapy. Teachers and school professionals need to develop Individualized Education Plan (IEP) that would address the individual abilities of each child. The teaching techniques to be used should be based on what a child is capable of doing and not necessarily what he/she finds difficult. The example is the application of visual aids, assistive technology, or alternative tools of communication which can enable the children to have an improved classroom performance.
The strength based approach has a potential of instilling confidence and assist children in achieving their potential. It is also notable that IQ must not serve only as the principal measure of capability. Though IQ may be useful in its information, it cannot be the sole option in making a decision concerning diagnosis, support and school placement. Rather, an examination of adaptive functioning of a child in terms of how they cope in everyday life, socialization, and solving real-life issues may be a more accurate indication of their capabilities and requirements.
References
Charman, T., Pickles, A., Simonoff, E., Chandler, S., Loucas, T. and Baird, G. (2011). The Special needs and autism project (SNAP): IQ in children with autism spectrum disorders. Psychological Medicine, 41(3), 619-627.
Dawson, M., Soulieres, I., Gernsbacher, M. A., and Mottron, L. (2007). The Degree and the Character of Autistic Intelligence. Psychological Science, 18(8), 657-662.
Cusack, J., Dumas, G., Frazier, T., et al., Charman, T., Brugha, T. S., Lord, C. (2020). Autism spectrum disorder. Nature Reviews Disease Primers, 6(1), 1-23.
Rutter, M. (1970). Autistic children: Infancy to adulthood. Seminars in Psychiatry, 2(4), 435-450.
Treffert, D. A. (2009). The savant syndrome: A phenomenal phenomenon. An overview:past, present, future. Philosophical Transactions of the Royal Society B: Biological Sciences, 364(1522), 1351-1357.
Centers of Disease Control and Prevention (CDC). (2020). Autism Spectrum Disorder Statistics and Data.