Summary: A new editorial by UCL Professor Dame Uta Frith argues that the current diagnostic category of Autism Spectrum Disorder (ASD) has broadened so widely that it risks clinical confusion, overdiagnosis, and misplaced care. The paper calls for a more precise, needs-focused approach that distinguishes meaningful subgroups within the spectrum.
Key Facts
- Dramatic prevalence shift: Autism diagnoses among UK schoolchildren have risen sharply since the 1960s, moving from roughly 4 in 10,000 children to about 1 in 57 today.
- Divergent patient subgroups: Emerging evidence suggests early-diagnosed children—often with pronounced developmental and language delays—and those diagnosed in adolescence or adulthood—often of average or above-average intelligence with co-occurring anxiety, depression, or ADHD—display different clinical and genetic patterns.
- Drivers of diagnostic expansion: Reduced stigma, broader interpretation of diagnostic criteria, increased public awareness, online self-identification, and a cultural tendency to medicalize everyday difficulties have all contributed to the growth in ASD diagnoses.
- No definitive biological biomarker: In the absence of an objective test for autism, diagnosis relies on behavioral assessment, clinical judgement, and self-report; concepts such as “masking” further complicate who meets current criteria.
- Call for diagnostic refinement: The editorial recommends replacing a single, broad “spectrum” label with clearer subgroups focused on specific needs, to improve treatment targeting and allocation of support.
Source: UCL
Overview
Autism is currently diagnosed as Autism Spectrum Disorder (ASD), a single category encompassing a vast range of people—from individuals who require continuous support to those who live autonomously and succeed professionally. In Psychological Medicine, Professor Dame Uta Frith argues that this “spectrum” has grown so inclusive that it may no longer be clinically useful.
When autism was first described in the 1940s, it applied to a small group of children with severe difficulties in social interaction, communication, and behaviour. Over decades the diagnostic boundaries have widened to include people with milder traits and intact language or learning abilities. Today, anyone of any age or intelligence level can be diagnosed with ASD if they meet behavioral criteria, which has contributed to the sharp rise in recorded prevalence.
Why diagnoses have increased
- Greater awareness and reduced stigma make families and clinicians more likely to consider an autism diagnosis.
- Diagnostic criteria have been interpreted more broadly over time.
- Social media and online communities amplify self-identification and informal self-diagnosis.
- A cultural shift toward explaining everyday challenges through medical or neurodevelopmental labels.
Dame Uta—whose work over more than 50 years helped shape modern cognitive theories of autism—notes that these social and cultural factors, combined with reliance on self-report and acceptance of concepts like “masking,” have lowered diagnostic thresholds and expanded who is identified as autistic.
Foundational contributions
Across her career, Dame Uta and colleagues proposed influential theories that remain central to autism research:
- Theory of Mind deficit: Some autistic people can find it difficult to infer others’ beliefs, intentions, or perspectives.
- Weak central coherence: A tendency to focus on detail rather than integrating information into a broader context, which can bring both strengths and challenges.
Her team also pioneered early neuroimaging studies that explored neural differences in autism.
Two distinct groups?
A central claim in the editorial is that the autism label now spans at least two clinically distinct groups. Children identified early in life commonly show clear developmental markers, often with language and learning impairments. In contrast, people diagnosed in their teens or adulthood frequently have average or high intelligence and present later with mental health concerns such as anxiety, depression, or ADHD. Some research points to differing genetic associations between these groups, suggesting they may not represent a single homogeneous condition.
Risk of misdiagnosis
Dame Uta warns that an overly broad diagnosis can produce overdiagnosis and misdiagnosis, where symptoms better explained by other conditions are subsumed under ASD. Diagnoses influence access to services, therapeutic approaches, and personal identity; an inaccurate label can therefore result in inappropriate or missed interventions, and dilute support for those with the most severe needs.
She emphasizes three diagnostic challenges:
- There is no biological or genetic test that definitively identifies autism.
- Diagnosis relies largely on clinician judgement, observation, and self-reported experiences.
- Behavioral phenomena such as “masking” expand the subjective reach of diagnostic criteria.
Culture, identity, and clinical practice
Autism has moved into popular culture and identity movements. Social media and community networks have helped many share experiences and reduce stigma, but they have also spread simplified portrayals and prompted searches for identity that sometimes lead to self-diagnosis. At the same time, the neurodiversity movement frames autism as a difference rather than a disorder, which can reduce stigma but also complicate decisions about medical diagnosis and clinical care.
Recommended changes
To improve clinical precision and better meet individual needs, the editorial recommends:
- Splitting the broad autism label into clearer, evidence-based subgroups.
- Focusing diagnostic practice on individual support needs rather than a single catch-all category.
- Prioritizing resources and tailored interventions for those with the greatest impairments.
- Refining diagnostic criteria to reduce confusion and limit misdiagnosis.
Dame Uta concludes that it is time to reassess whether the term “spectrum” has become too expansive. Greater diagnostic precision, she argues, will improve research clarity, clinical decision-making, and the allocation of support services.
Key Questions Answered:
A: Professor Dame Uta Frith is a leading developmental psychologist whose pioneering research since the 1960s helped define cognitive approaches to autism, including the Theory of Mind deficit and Weak Central Coherence concepts.
A: Early-diagnosed individuals typically show developmental markers in childhood, including language delays and learning challenges. Late-diagnosed individuals are more often identified in adolescence or adulthood, tend to have average or above-average intelligence, and frequently present with co-occurring mental health conditions.
A: Without objective biomarkers, a catch-all definition increases the risk of overdiagnosis and misdiagnosis, which can lead to inappropriate care, missed treatment for other conditions, and reduced access to tailored support for those with severe needs.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- The journal paper was reviewed in full.
- Additional context was added by editorial staff.
About this autism research news
Author: Henry Killworth
Source: UCL
Contact: Henry Killworth – UCL
Image: The image is credited to Neuroscience News
Original Research: Open access. “Autism Spectrum Disorder: Has it lost its meaning and is it leading to misdiagnosis?” by Uta Frith. Psychological Medicine. DOI: 10.1017/S0033291726105376
Abstract
Autism Spectrum Disorder: Has it lost its meaning and is it leading to misdiagnosis?
Background
Since the 1940s the concept of autism has evolved considerably. Autism Spectrum Disorder is highly heterogeneous, and recorded prevalence has risen substantially.
Methods
This essay examines reasons for conceptual change and considers their consequences for research and clinical practice.
Results
Cultural shifts—such as increased inclusion, harm avoidance, reliance on self-report, and acceptance of masking—have lowered diagnostic thresholds. Popular interest in autism has further boosted numbers through self-identification and searches for identity.
Conclusions
Substantial differences now appear between those first diagnosed in childhood and those first identified in adolescence or adulthood. It is timely to investigate the reasons for these conceptual changes and their implications for clinical practice and research.