That depends on how you're defining "stuttering." There is "evidence of stuttering" in handwriting, playing a musical instrument and sign language, however these are generally a delay in initiation (e.g., a block). You don't see the repetitions or prolongations that are typical of classic stuttering. Therefore, I think it's a little dubious to call them stuttering. They're closer to dystonia than stuttering. And sorry to say, the handwriting analysis has been done (http://www.sciencedirect.com/science/article/pii/0093934X88900661 , http://www.tandfonline.com/doi/abs/10.1080/87565649209540534#.Uot0L2R4awE) The key to a successful undergrad thesis is simplicity. The ability to get it done is really what they're looking for. They're not looking for earth shattering research. So, keep it simple. (Plus, as your continue on in your project you're going to end up hating it .... I did with my undergrad and masters theses .... I still like my dissertation ... for now). One thing we don't know a lot about is why SLPs self-report a lack of confidence in treating stuttering. My guess is it's a combination of stuttering being a low incidence problem, apprehension of the emotionality of stuttering, and a lack of knowledge of appropriate therapy techniques. An easy, publishable study is a simple survey asking SLPs to demonstrate their knowledge of stuttering therapy. Simple, straight forward, easy to analyze.