> is there any scientific paper about the most effective ways to solve stuttering? Yes, I have read many research papers on different speech therapies. You can simply google them by typing in google: "stuttering" "research" "therapy" (or "program"). Another way is to manually search for such research studies on free [research databases](https://www.google.com/search?q=free+research+databases). I wish more people would actually take the time to read dozens of recent research studies, and discuss them in this subreddit