“…There is a need for more objective and ecologically valid measurement tools that can accurately quantify not only the change associated with treatment, in terms of amount or severity of stuttering, but also the change in amount of social participation. Various measures of stuttering are routinely used clinically and in research, however there is debate regarding the reliability of many of those measures (Cordes & Ingham, 1994;Kully & Boberg, 1988;O'Brian, Packman, Onslow, & O'Brian, 2004;St Clare et al, 2009;Yaruss & Quesal, 2006). Examples include those addressing the frequency and severity of stuttering, i.e.…”