My son (nearly 7) was diagnosed with SPD last year. I thought this was the answer, the diagnosis that encapsulated him and his issues. However even though we've been following an OT program and he's been having social interaction classes he still has real problems with social interaction and the school requested for him to be assessed for ASD. They filled in some forms apparently and today I've been asked to give permission for the autism service to fully assess him and contact his other professionals. I'm not sure how I feel at the moment, but I am not all that educated on ASD. How is it different to SPD? And how is a diagnosis of ASD (if indeed thats what they decide) actually going to help him? I mean, they're already doing these social interaction classes (with little effect) and following the OT program (with great effect). How does an ASD dx change this and benefit him? I worry about all this analysising of him doesn't actually result in any positive benefit to him and I wouldn't want to give permission for something that actually isn't going to help him.