Autism symptoms reduced nearly 50 percent two years after fecal transplant
sciencedaily.com
sciencedaily.com
The study authors themselves acknowledge the placebo effect although they naturally minimized the effect on the results.
Well you could also conclude that you picked the wrong placebo since perhaps it's not an ineffective substance or treatment. This is the issue with acupuncture studies - turns out placebo treatments actually have an effect so you can't use the results of those studies in any substantive way.
This autism could be working the same way - just the fact that someone is caring about your child can cause a ripple effect that improves the child's behavior or influences the parents and/or evaluators evaluation of the child's behavior.
That's quite the catch
Sounds like false admissions through water boarding, or gay conversion therapy to me.