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Are There Specific Assessments to Differentiate ADHD from ASD? 

Posted
Updated
ByMy Patient Advice
Author: Avery Lombardi, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

There are specific ADHD and ASD assessments and testing tools that clinicians use to ensure an accurate diagnosis. These assessments focus on identifying the unique traits and behaviours associated with each condition, based on the diagnostic criteria outlined in diagnostic manuals such as the DSM-5. 

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ADHD ASD Assessment: Key Testing Tools 

To differentiate between ADHD and ASD, clinicians often begin with comprehensive clinical interviews with the child, parents, and teachers. For ADHD, the assessment will primarily focus on symptoms such as impulsivity, hyperactivity, and inattention that are present in multiple environments (e.g., school, home). In contrast, ASD assessments focus on social communication deficits and restricted, repetitive patterns of behaviour, which are central to the diagnosis of ASD. 

Several testing tools are commonly used in ADHD and ASD assessments, including: 

  • Conners Rating Scales for ADHD: These questionnaires assess the presence and severity of ADHD symptoms in different settings, such as at home or in school. 
  • Autism Diagnostic Observation Schedule (ADOS): A structured observation tool used to assess social communication and repetitive behaviours, helping to identify traits of ASD. 
  • Social Responsiveness Scale (SRS): A questionnaire that measures the degree of social impairment, often used to evaluate ASD symptoms. 

In conclusion, different methods are used for ADHD and ASD assessments. By using a combination of testing tools and clinical evaluation, professionals can differentiate between ADHD and ASD based on the diagnostic criteria. Accurate diagnosis is essential for implementing effective treatment and support strategies for children with either condition. 

Visit providers like ADHD Certify for personal consultations and expert guidance tailored to your unique situation. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Differential Diagnosis of ADHD.

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Avery Lombardi, MSc
Author

Avery Lombardi is a clinical psychologist with a Master’s in Clinical Psychology and a Bachelor’s in Psychology. She has professional experience in psychological assessment, evidence-based therapy, and research, working with both child and adult populations. Avery has provided clinical services in hospital, educational, and community settings, delivering interventions such as CBT, DBT, and tailored treatment plans for conditions including anxiety, depression, and developmental disorders. She has also contributed to research on self-stigma, self-esteem, and medication adherence in psychotic patients, and has created educational content on ADHD, treatment options, and daily coping strategies.

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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