Experts Raise Alarm Over Potential Overdiagnosis of Autism in Children
Paediatric and autism researchers have issued a stark warning that autism in children may be overdiagnosed, potentially harming both the children themselves and those with the greatest needs. They argue that common behaviours, such as difficulty maintaining eye contact or 'toe-walking', do not always indicate the presence of the developmental disorder.
Questioning Diagnostic Tools and Concepts
The researchers, whose findings were published in JAMA Pediatrics, have cast doubt on current diagnostic methods. They claim that nearly half of children diagnosed with autism in community settings do not meet the criteria when reassessed by specialist teams. This raises concerns about the accuracy of tools like the autism diagnostic observation schedule, a 40-60 minute session used by clinicians.
Lester Liao, a paediatrician at Montreal Children's Hospital and assistant professor at McGill University, and Eric Fombonne, director of autism research at Oregon Health & Science University, co-authored the report. They highlight that emotional and behavioural problems can inflate scores on autism tests, even when a child does not have the condition. For instance, poor eye contact might stem from inattention or social anxiety rather than autism-specific traits.
Resource Dilution and Vulnerable Groups
The experts emphasise that overdiagnosis leads to 'resource dilution', diverting limited public resources and professional support away from children with the most significant challenges. They note that better-resourced families, with more cultural capital or advocacy skills, often secure diagnoses for milder cases, leaving the most vulnerable—such as those unable to self-advocate or families providing full-time care—without adequate support.
This issue is particularly pressing given the rising numbers: there are over 166,000 autistic pupils in schools in England, an 8% increase since 2020. The NHS lists signs of autism in young children as avoiding eye contact, not responding to their name, repetitive movements, and reduced play engagement, with older children showing strict routines, intense interests, and social communication difficulties.
Expanding Definitions and Camouflaging Concerns
The researchers also question the concept of 'camouflaging' or 'masking', where individuals with autism adjust their traits to fit social situations. They argue that this behaviour presupposes an understanding of social norms, which may not be present in children with profound autism, thus reflecting a milder form of the condition and contributing to diagnostic expansion.
They warn that overdiagnosis could create a 'self-fulfilling prophecy', where labelled children have fewer opportunities to develop social and behavioural skills. For example, a socially withdrawn child might be permitted to isolate, reducing social practice and reinforcing rigid behaviours.
Signs and Symptoms of Autism
Autism involves challenges with social, emotional, and communication skills, typically emerging before age three and lasting a lifetime. Key signs include unusual reactions to sensory inputs, difficulty adapting to routine changes, trouble expressing desires or feelings, avoidance of eye contact, and preferring solitude. The researchers stress that a spectrum diagnosis should not negate the difference between mild difficulties and severe impairments.
Overall, the call is for more precise diagnostics to ensure resources are targeted effectively, safeguarding the well-being of all children affected by autism.
