Comparison of 10 stuttering and 10 nonstuttering young adult subjects on self-paced rhythmic tasks at various rates found that the stutterers performed more slowly than the nonstutterers and were less variable than nonstutterers suggesting less flexible systems more susceptible to breakdown. (Author/DB)

The study investigated the reaction times in the fluent speech utterances of 20 adult stutterers and 20 nonstutterers. Results indicated that reaction times for longer utterances and for utterances requiring minimal preparation were longer for stutterers than for nonstutterers, suggesting stutterers may have difficulty in motor programing of…

The study compared five adult stutterers' and five adult nonstutterers' fluent speech patterns produced during one nonshadowed reading and two speech-shadowing conditions (immediate repetition of a heard message). Among results were that stutterers produced fewer speech production errors than nonstutterers during shadowing conditions. (Author/DB)

This study compared duration characteristics of single repetitions of single-syllable words in the speech of 15 preschool children near the onset of stuttering to those of 18 nonstuttering children. There appeared to be a tendency for repetitions of very early stutterers to be faster than repetitions of nonstuttering children. (Author/DB)

This study examined a validation procedure combining self-reports with independent verification to identify cases of recovery from stuttering without formal treatment. A Speech Behavior Checklist was administered to 42 individuals familiar with recovered subjects' past speech. Analysis of subjects' descriptions of their past stuttering was…

This study examined speech disfluency clusters in the speech of 60 3- to 6-year-old children, half of whom stuttered. Results indicated that the children who stuttered produced significantly more "stuttering-stuttering" clusters and significantly more "stuttering-repair" clusters, whereas nonstutterers never produced "stuttering-stuttering"…

The study examined whether stutterers (27 children and 19 adults) subvocalize more slowly than nonstutterers and need more time for overt fluent speech production. Results indicated that a strictly motoric explanation of stuttering is inadequate as stutterers and nonstutterers differ in temporal parameters not only during speech execution, but…

Sixteen preschool subjects were evaluated within several weeks after stuttering onset and followed for six months. Findings showed a strong tendency for reduction in stuttering-like disfluencies, number of head/face movements, and parent and clinician severity ratings of stuttering. Several subjects, including severe cases, exhibited complete…

Fifteen stutterers (aged 5-16) were treated using graded airflow, tension/relaxation, and electromyographic biofeedback to reduce stuttering frequency. In a second study, addition of a discriminative stimulus control procedure to maintain fluency made the treatment program more effective than the first study and achieved a level of <1% stuttered…