Understanding Barriers to Assessment and Diagnosis of Autism in Adulthood: Where Are We Now and How Do We Move Forward?

Assessment and diagnosis of autism in adulthood is a growing area of interest for both clinical and research practice. In this commentary, we present a thematic analysis following the first International Society for Autism Research Special Interest Group (SIG) focused on assessment and diagnosis of autism in adulthood. An increasing recognition of missed or misdiagnosed autistic adults is highlighted throughout the commentary. Recommendations for reducing barriers in diagnostic processes are reviewed, including improving existing adult autism measures and developing new ones, especially self-report/interview tools capturing what cannot be externally observed; providing more information about the process ahead of time and better post-diagnostic support; better assessment of psychosocial and mental health histories; training to promote clinicians' understanding of adult autism; and the importance of considering culture. Professional and government bodies should support the development of neuroaffirming, client-centered practice guidelines that actively include input and co-design from autistic adults.