It seems to me that the effects you find for the categories you examine are likely not strongly related. In particular, I am utterly unsurprised that Autistic persons showed an effect on the spinning face but not the , given that facial recognition is a critical social skill that Autistic people tend to struggle with:
https://www.ncbi.nlm.nih.gov/pubmed/15215211
It seems more likely that this is the cause of the effect you find than any problems with a single neurotransmitter, which to me sound suspiciously like the old idea that lack of serotonin was the only cause of depression.
It seems to me that the effects you find for the categories you examine are likely not strongly related. In particular, I am utterly unsurprised that Autistic persons showed an effect on the spinning face but not the , given that facial recognition is a critical social skill that Autistic people tend to struggle with:
https://www.ncbi.nlm.nih.gov/pubmed/15215211
It seems more likely that this is the cause of the effect you find than any problems with a single neurotransmitter, which to me sound suspiciously like the old idea that lack of serotonin was the only cause of depression.