Of all the misguided, abusive studies. It beggars belief that a board somehow approved this.
What happened here is simple: the autistic kids got better at masking in order to placate the researchers who were shoving poop up their butts. In the hope of making it stop.
to be honest I doubt people were masking in response to poop shoving, poop shoving is not the worst and presumably the control group just had non-poop
what seems more plausible to me would be ~<<poop helped something, something made life easier, autistic life is less obvious and disruptive to non-autistics when life is easier>>