Data on disfluencies in the speech of non-stuttering adults are relevant to several aspects of the assessment and treatment of adults who stutter. Currently, very few sources provide relevant data. In the existing literature on normally fluent speakers, there is no consistency in sample length or topic or in which types of disfluency are counted.…

Comparison of acoustic correlates of phonatory control in the fluent utterances of 10 preschool-aged boys who were stutterers and in nonstuttering control subjects found significant differences between the two groups for shimmer measures. (Author/DB)

Analysis of use of positron emission tomographic measurements of resting-state regional cerebral blood flow in 29 men, 10 of whom stuttered, did not support the idea that developmental stuttering is associated with abnormalities of blood flow at rest. Findings did suggest an essentially normal functional brain terrain with a small number of minor…

This study, involving an adolescent and adult male with stuttering problems, evaluated modification of the frequency of electroglottograph-measured phonation intervals on stuttering and speech naturalness. Both subjects demonstrated that stuttering could be controlled by modifying the frequency of phonation intervals within short duration ranges,…

Paralinguistic behaviors, including speech rates and turn-taking behaviors, of five-year-old boys who stutter (n=11) and boys who do not stutter (n=11) and their fathers were investigated. No significant differences were found in comparisons of the two groups of fathers or of the two groups of children for any of the paralinguistic behaviors.…

Analysis of pedigrees from parents of 69 preschool children who stuttered revealed that more male than female relatives ever stuttered but that female subjects who stuttered had more female relatives who ever stuttered than did male subjects. Segregation analyses suggest that transmission of a single major genetic locus increases the liability to…

Twelve adult males who stutter and 12 controls were tested on naming words and symbols and their ability to encode and retrieve memory representations of a combination of a symbol and a word. Findings question the claim that people who stutter have problems in creating abstract motor plans for speech. (Author/DB)

This study investigated changes in the speech patterns of young adult male subjects when stuttering was modified by deliberately prolonging speech. Three subjects showed clinically significant stuttering reductions when using prolonged speech to reduce their stuttering. Resulting speech was perceptually stutter free. Acoustic and…

Clause, syllable, and response latency characteristics of conversational utterances were assessed in 14 boys who stuttered and 14 normally fluent boys. Findings suggest that changes in the number of clausal constituents that must be constructed, stored, or coordinated within an utterance may influence the likelihood of speech errors and, hence,…

Comparison of the speech fluency and phonology of 18 boys (mean age 61 months) who stuttered and demonstrated either normal or disordered phonology found that the two groups were generally similar in terms of their basic speech disfluency, nonsystematic speech error, and self-repair behaviors. Predictions of the covert repair hypothesis of…

This study sought to identify patterns of impaired acoustic laryngeal reaction time as a function of response complexity parallel to metabolic measures of brain function. Findings indicated that the disruption in speech motor control for 16 adult male developmental stutterers was systematically related to metabolic asymmetry in left superior and…