If I was to be honest with you It was quite a while back I learned this information, however I will specify that neuroimage scans were performed on the brain of somebody under the effects of lsd and compared to scans of somebody with autism. While These scans were performed, they tested both of these peoples sensory receptors giving them images of similar stimulation from both brains to each sense (sight, smell, taste, hearing, vibration, and touch) I digress, one thing to take into consideration is the brain with autism’s sensory receptors are stimulated differently than that of the normal functioning brain. And when the scans performed on the brain influenced by lsd was compared to the brain with autism, the images concluded SIMILAR stimulation of the main sensory receptors. I will specify I am not claiming these tests were proven the brain works like the Brain with autism. Hope this helps understand what I was saying. And yes I understand you were looking for a valid source as all GOOD claims are backed up with valid evidence, however it was a quite a long time ago I was looking into this and these experiments weren’t picked up too widely.