Lung volumes and ventilatory patterns used by 10 healthy and 14 asthmatic subjects during conversation, monologue, and counting at two loudness levels were studied. Asthmatics were found to favor respiratory over communications needs. They used a greater percentage of their reduced vital capacity, with slower inspiratory and faster expiratory flow…

Stuttering frequency in 10 adult stutterers (ages 22-48 years) was measured when speaking spontaneously alone, then with an adult male conversationalist, and finally speaking alone again. Percent stuttering increased in the conversational situation compared with the first alone situation and decreased again during the second alone situation.…

A literature review of conditions that might be expected to increase stuttering reveals that most investigators have not been able to raise stuttering frequency above control or base levels. Although some variables may increase stuttering, the research is too meager to speculate about underlying factors. (Author/CL)

Approximately 47,200 spontaneous utterances of four nonstuttering children were analyzed for the occurrence of developmental disfluency from the time of one word utterances through the emergence of beginning syntax. Variations were found among the children's profiles with systematic changes in disfluency at each succeeding mean length of utterance…

This study analyzed a conversational speech sample from 10 preschool children stuttering for a year or less and age- and sex-matched nonstuttering children. Analysis indicated no significant between-group differences for either the duration of acoustically measured sound/syllable repetitions and sound prolongations or the number of repeated units…

Cluster formation in speech disfluencies of 15 preschool stuttering children and 15 nonstuttering controls was studied and compared. Clustering was found to be a significant factor in disfluent speech for both normal and stuttering children, but proportions of clustered disfluencies and size of clusters were significantly greater in the…

This study attempted to empirically demonstrate the validity of a twofold classification of speech disfluency in adult stutterers. Instrumentation and procedures permitting reliable identification and coding of 9 disfluency behaviors were developed and applied to monologues of 180 adult stutterers. Factor analyses supported the two-factor…

Occurrence of residual stutterings on adjacent words caused by blotting out words at random in a reading passage was studied. (KW)

Stutterers were found to have a significantly greater number of pauses 150 to 250 msec long than nonstutterers, indicating that even the fluent speech of stutterers differs from normal speech. (Author/KW)

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.…

Spectrographic analyses were performed of utterances of three groups of children: four producing correct /w,r,l,j/ (ages three-five), four with developmental w/r and w/l substitutions (age four), and four with articulation impairments (ages six-seven). Findings supported the hypothesis that children's underlying forms are unique and represent…

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"…