Can Autism ADI‑R Misdiagnose Psychosis?

PostedNovember 11, 2025

UpdatedNovember 11, 2025

ByMy Patient Advice

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

Yes, ADI-R and psychosis misdiagnosis can occur, as the ADI-R (Autism Diagnostic Interview-Revised) may sometimes be misled by overlapping symptoms between autism and psychosis. The ADI-R is a widely used tool for identifying autism, but certain psychiatric symptoms can mirror autistic traits, increasing the risk of diagnostic confusion.

Why ADI-R Can Be Challenging in Cases of Psychosis

Here’s how misdiagnosis can occur when psychotic symptoms resemble features of autism:

Differential Diagnosis:

Making a clear distinction between autism and psychosis can be difficult, particularly in the early stages. While the ADI-R focuses on long-standing developmental behaviours, the tool may struggle with differential diagnosis when psychosis presents with social withdrawal, flat affect, or unusual thinking, all of which may appear autism-like on the surface.

Symptom Overlap:

Both conditions can involve communication difficulties, social detachment, and restricted or repetitive behaviours. This symptom overlap can cause confusion if not carefully evaluated in a broader clinical context, especially when the individual’s developmental history isn’t thoroughly explored.

Mental Health Confusion:

In some cases, clinicians unfamiliar with the nuances of autism and psychosis may rely too heavily on structured tools like the ADI-R, contributing to mental health confusion. Without additional psychiatric assessments, there’s a risk of misattributing symptoms of psychosis to autism, or vice versa.

Because of these challenges, the ADI-R and psychosis misdiagnosis risk highlights the importance of using the tool alongside comprehensive mental health evaluations. For a more accurate assessment experience, visit providers like Autism Detect for professional consultations.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Autism Diagnostic Tools (e.g., ADOS-2, ADI-R).

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.