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What Are False Positives in Autism Screening? 

Author: Lucia Alvarez, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

False positives in autism screening occur when a child’s screening results suggest autism, but the child does not actually have the condition. These types of errors can occur due to the limitations of screening tools or because certain behaviours may appear like those associated with autism but are related to other developmental or environmental factors. While autism screening tools are valuable for early detection, understanding screening limitations is crucial for accurate results and appropriate follow-up. 

A false positive can lead to unnecessary concern and further testing, which may cause emotional stress for parents and caregivers. However, it’s important to note that while false positives are possible, the overall benefit of early autism screening outweighs the risks of misidentification, as it allows for early intervention if necessary. 

How False Positives in Autism Screening Happen 

Here’s why false positives in autism screening can occur: 

Screening Limitations:

It exists because autism screenings rely on observable behaviours, which can overlap with other conditions or developmental phases. For example, some children may exhibit delays in social interaction or communication due to temporary factors, such as language development stages or social anxiety, rather than autism. 

Misidentification of Behaviours:

Certain behaviours, such as withdrawing from social interaction or preferring routine, may also occur in other developmental conditions or even in children who are naturally more introverted. These behaviours may appear like autism traits, leading to misidentification in screening results. 

Diagnostic Accuracy:

The diagnostic accuracy of autism screening tools depends on the child’s age, the tool used, and how the results are interpreted. Even the most widely used screening tools are not 100% accurate, so a false positive result should always be followed by a more thorough evaluation by a trained specialist. 

While false positives in autism screening can cause confusion, they highlight the need for further assessment. For expert advice and personalised consultations, visit providers like Autism Detect to guide you through the next steps and help ensure accurate autism diagnosis and support. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Autism Screening and Assessment Tools.

Lucia Alvarez, MSc
Author

Lucia Alvarez is a clinical psychologist with a Master’s in Clinical Psychology and extensive experience providing evidence-based therapy and psychological assessment to children, adolescents, and adults. Skilled in CBT, DBT, and other therapeutic interventions, she has worked in hospital, community, and residential care settings. Her expertise includes grief counseling, anxiety management, and resilience-building, with a strong focus on creating safe, supportive environments to improve mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS
Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy. 

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