My son got his credential in music education but is now working with students who have special education needs in a post secondary program, so your thesis indeed sounds Very Interesting. Also my daughter (who has Down syndrome) is involved in Musical Connection Through Inclusion as an assistant, and the director has even gotten her to sing (but not on pitch yet -- LOL)! So if you publish your research anywhere I would love to read it or would love to share it with the director of that non-profit.