How Accurate is the Adult ADHD Self-Report Scale (ASRS-18)?

PostedSeptember 10, 2025

UpdatedSeptember 10, 2025

ByMy Patient Advice

Author: Harriet Winslow, BSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

The ASRS-18 accuracy is considered to be high when used as part of the diagnostic process for adult ADHD. The Adult ADHD Self-Report Scale (ASRS-18) is a well-regarded screening tool designed to assess ADHD symptoms, including inattention, impulsivity, and hyperactivity. It is widely used by healthcare providers to quickly evaluate the likelihood of ADHD in adults, although it is not a definitive diagnostic tool. ASRS validation studies have shown that the tool has good reliability and effectively identifies ADHD symptoms.

The reliability of ASRS is generally good, with research showing that it effectively identifies ADHD symptoms. However, it’s important to remember that the ASRS-18 accuracy can depend on how honestly individuals respond to the questions. The scale’s clinical accuracy can also be influenced by the presence of co-occurring conditions, such as anxiety or depression, which can sometimes mimic ADHD symptoms.

Common Symptoms

Inattention

The ASRS-18 is highly accurate in identifying patterns of inattention, such as difficulty staying focused or completing tasks.

Impulsivity

The tool effectively identifies impulsive behaviours, such as interrupting others or acting without thinking.

Hyperactivity

While hyperactivity is more common in children, the ASRS-18 can still assess symptoms of restlessness and difficulty relaxing in adults.

The ASRS-18 accuracy provides a useful first step in diagnosing ADHD, but it should be followed by a more thorough clinical evaluation to confirm the diagnosis and rule out other conditions.

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Rule-outs for other conditions.

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

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.