“..People who stutter report greater success with speech treatment that focuses on attitudes than on speech modification। And active participation in self-help activities appears to reduce the negative life impacts of stuttering. These were among the findings in a survey conducted last year by the National Stuttering Association (NSA)..”
Please note – role of Attitude and self help activities.. Here is the complete ASHA article..
http://www.asha.org/about/publications/leader-online/archives/2003/q2/030513e.htm