Can you spot the signs of undiagnosed Autism in adults? How to tell if you have autism? Undiagnosed autism in adults is a lot more common than you think. There is one or more autistic children in every classroom nowadays and this is not an epidemic. We were all here all along. It’s just that diagnosis can be challenging because to accurately see autism in adults, we need to let go of unhelpful stereotypes. In this video, I will share 7 signs of undiagnosed autism in autistic adults.