There is general agreement that stuttering is caused by a variety of factors, and language formulation and speech motor control are two important factors that have been implicated in previous research, yet the exact nature of their effects is still not well understood. Our goal was to test the hypothesis that sentences of high structural…

The present study explored the prevalence of self-reported stuttering in a Finnish twin population and examined the extent to which the variance in liability to stuttering was attributable to genetic and environmental effects. We analyzed data of 1728 Finnish twins, born between 1961 and 1989. The participants were asked to complete a…

Phonetically governed changes in the fundamental frequency (F[subscript 0]) of vowels that immediately precede and follow voiceless stop plosives have been found to follow consistent patterns in adults and children as young as four years of age. In the present study, F[subscript 0] onset and offset patterns in 14 children who stutter (CWS) and 14…

Objective: The purpose of this article is to introduce a new assessment designed to measure the orofacial abilities of children who stutter (CWS), the Movement, Articulation, Mandibular and Sensory Awareness (MAMS) Orofacial Assessment. The new instrument was developed and validated to measure orofacial abilities in a comprehensive manner. Design:…

The purpose of this study was to investigate whether brain activity related to the presence of stuttering can be identified with rapid functional MRI (fMRI) sequences that involved overt and covert speech processing tasks. The long-term goal is to develop sensitive fMRI approaches with developmentally appropriate tasks to identify deviant speech…

Stuttering occurs across all languages and cultures. However, the impact of speaking more than one language on assessment and treatment of young children who stutter is not well documented. This paper discusses some of the challenges related to clinical issues pertaining to this population including (a) identifying stuttering in an unfamiliar…

Bakhtiar, Seifpanahi, Ansari, Ghanadzade and Packman (2010) reported high inter-, and intra-judge agreement of a translation of the Stuttering Severity Instrument (SSI-3) for preschool Persian-speaking children who stutter. Translation of SSI-3 into Persian is desirable as there is no standardised stuttering severity test for that language.…

Replicated evidence of satisfactory 1- and 2-year post-treatment outcomes has been reported for the "Comprehensive Stuttering Program" (CSP). However, little is known about longer term outcomes of the CSP. Yearly follow-up measures were obtained from 18 participants for 5 consecutive years. At 5-year follow-up, participants were maintaining…

The purpose of the present investigation was to assess longitudinal word- and sentence-level measures of stuttering in young children. Participants included 12 stuttering and non-stuttering children between 36 and 71 months of age at an initial visit who exhibited a range of stuttering rates. Parent-child spontaneous speech samples were obtained…

This study investigated listeners' perception of the speech naturalness of people who stutter (PWS) speaking under delayed auditory feedback (DAF) with particular attention for possible listener differences. Three panels of judges consisting of 14 stuttering individuals, 14 speech language pathologists, and 14 naive listeners rated the naturalness…

The purpose of this study was to compare the characteristics of stuttering-like disfluencies in a group of native Dutch-speaking children who stutter (n = 693), with a group of normally fluent children (n = 79). Methods involved the observation of stuttering-like disfluencies in participants' conversational speech samples (total 77,200 words),…

Several authors have suggested that devices delivering altered auditory feedback (AAF) may be a viable treatment for adults and children who stutter. This paper reviews published, peer reviewed journal papers from the past 10 years that investigate the effect of AAF during different speaking conditions, tasks and situations. A review of that…

The data of recent research studies have shown that by 3 years of age children show an awareness of dysfluency and that by at least the age of six, youngsters who stutter have a speech-associated attitude that is more negative than that of their peers. These findings led to the present study in which the KiddyCAT, a self-report measure, was used…

The purpose of this study was to investigate the nature of recovery from stuttering based on the experiences of adults who recovered without treatment. Using a semi-structured, open-ended interview format, 15 speakers verified as persons who recovered without treatment were asked to describe their status as everyday speakers. Seven speakers…

The purpose of this descriptive investigation was to explore perceptual judgments of speech naturalness, compared to judgments of articulation, language, disfluency, and speaking rate, in the speech of two youths who differed in cluttering severity. Two groups of listeners, 48 from New York and 48 from West Virginia, judged 93 speaking samples on…