Nevertheless, one clinical study with slightly more precise information on IQ in ASD reported that 23% of the participants had an IQ < 85, while 45% had an average IQ, and 32% had an IQ above average (10).
About 70% of children with ASD have a non-verbal IQ below 70. Of these, 50% have a non-verbal IQ below 50. Overall, up to 50% of people with "severe learning difficulties" have an ASD. Read more about the symptoms of ASD.
Autism Prevalence
31% of children with ASD have an intellectual disability (intelligence quotient [IQ] <70), 25% are in the borderline range (IQ 71–85), and 44% have IQ scores in the average to above average range (i.e., IQ >85).
The intelligence levels of autistic people, in general, are highly polarized, with many autistic people scoring average to above-average; compared to the general public, more autistic people score in the gifted range (140+ IQ).
Generally, adaptive skills track with IQ. Someone with average IQ would be expected to have average adaptive skills. However, in autism, researchers have found that adaptive skills may lag behind IQ, sometimes far behind.
Those with Asperger's syndrome, in contrast, must by definition have suffered no cognitive delay during their first 3 years of life. This means that they will usually have at least a “normal” IQ. In some cases, their IQ may be very high, even in the genius range. There are, however, different kinds of smarts.
However, there is no clear link between ADHD and IQ. A person may have a high, average, or low IQ score and also have ADHD. ADHD may cause a person to interrupt in class or perform poorly on tests. This can cause other people to believe that they may have a lower IQ.
Over the years, researchers have fre- quently noted that many individuals with exceptional gifts manifest autistic-like behaviors. Further, an increasing number of individuals with autism or Asperger's are identified as being gifted. These twice-exceptional learners are in good company.
However, epidemiological data from different countries indicate a high prevalence of low intelligence quotient (IQ) scores in children with ASD. According to the most recent ASD surveillance estimates in the US, 35% of 8‐year‐old children with ASD have Intellectual Disability (ID) (IQ < 70, Maenner et al., 2021).
Some Aspergers investigators hypothesize that well-known figures, such as Thomas Jefferson, Jeremy Bentham, Albert Einstein, Isaac Newton, Glenn Gould and Ludwig Wittgenstein had Aspergers because they showed some Aspergers-related tendencies or behaviors, such as intense interest in one subject, and/or social problems ...
Research shows that more than half of all autistic individuals have an above-average IQ, while roughly 16% have an IQ higher than 130. But having high intelligence doesn't mean that autistic individuals don't experience some challenges associated with the diagnosis.
Increasing IQ Through Early Intervention
This includes speech therapy, occupational therapy, and Applied Behavioural Analysis (ABA). Early Intervention can help teach a child with ASD basic skills such as communication, gross and fine motor skills, and thinking.
Though autistic people may respond to emotions and social cues differently than neurotypical people, this does not mean they lack empathy. Just like neurotypical people, levels of empathy vary between autistic individuals.
One phrase that is often associated with ASD is “high-functioning,” which refers to an individual who experiences the social and emotional difficulties and stereotyped behaviors or interests that are associated with autism, but does not have any significant delay in intellectual or verbal development.
Asperger's is now considered a developmental disorder on the autism spectrum and is no longer considered a separate diagnosis. Individuals with Asperger's have often not been viewed as having a developmental disability due to commonly being characterized as having standard or higher than average intelligence.
Even so, lots of people still use the term Asperger's. The condition is what doctors call a "high-functioning" type of ASD. This means the symptoms are less severe than other kinds of autism spectrum disorders.
Most people have an average IQ between 85 and 115. Overall, about 98% of people have a score below 130. Only 2% of the population score above that and are considered above average. But your IQ score isn't simply about bragging rights.
Difficulties talking or talking late. Having problems remembering things. Inability to connect actions with consequences. Difficulty with problem-solving or logical thinking.
The cause of Asperger syndrome, like most ASDs, is not fully understood, but there is a strong genetic basis, which means it does tend to run in families.
People with Asperger profiles absolutely do have feelings, although they may have difficulty identifying and discussing them. In fact, many feelings – such as fear, anger and joy – seem to be experienced more intensely by those with Asperger profiles than by average people.
It is not always possible to know if someone has Asperger's (now called “autism spectrum disorder,” and was formerly called "high-functioning autism"), which causes people to have difficulty in social interactions, but most people with Asperger's have difficulty relating to others in some form.
Research shows that the signs of intelligence are usually good memory and thinking ability, good attitude and hard-working nature, general and tacit knowledge, language proficiency and reasoning, decision-making, trust, creativity, achievements, good intuition, and problem-solving.
Does an individual's IQ change with age? An individual's IQ does not change with age. In other words: if you did an IQ test now and then another one in 10 years' time, your IQ score will probably be very similar. This is because IQ is always measured relative to other people your age.