SPD, Yes

Hello I work in an autism classroom, and see it everyday. Some of the kid's will grab your hands and make you squeeze them hard, when you do it noticeably calms them down and relieves some of their anxiety. The Public school system has training sessions on what they call "deep pressure" which is squishing and squeezing, so they too must believe in it. The problem with diagnosis is that the majority of children who suffer from it the most also lack the ability to communicate.