We had the pleasure of working with YI for our son's therapy--once, around when our son was 6 months, and then a bit more than a year later (we had moved, and SARC assigned us to another agency, which we eventually went back to YI).
The technician that was assigned to our son (the second time) noticed that he showed behavioral patterns that indicated SPD. Neither my wife nor I were familiar with this, and the tech suggested some resources for us to read and learn from (one of which was The Out Of Sync Child, which comes on an audiobook).
I am always thankful for YI and that tech, as, until our son could officially be diagnosed (later diagnosed as autism), that tech integrated her therapy to be in line with children who have SPD. Unfortunately, SARC assigned another agency to our son (as he required many more hours, which YI couldn't meet; as well as other services that YI doesn't offer). That agency, among many other problems, didn't know (or bother to learn about) SPD. Fortunately, after pushing our Regional Contact for another agency (as well as asking to go back to YI, as, even though our son was getting fewer hours, those hours were FAR MORE SUBSTANTIVE than the new agency--in fact, he was REGRESSING with the new agency), the new agency (which could meet the new hour demands and other services) knew about SPD and their techs are trained about it. read more