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.…

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"…

Nineteen stutterers provided samples of speech and reading from which scores representing 46 visible-audible phenomena were correlated. (Author)

Twelve preschool nonstutterers and their mothers were matched with 12 stutterers and their mothers. Analysis of intervention demonstrated that mothers of stutterers talked significantly faster to all children. Stutterers spoke slower than nonstutterers and severe stutterers spoke slower than moderate stutterers. Results revealed an interactive and…

Syntactic analysis (kernel and matrix sentence frame types and transformational usage) of speech of fluent and disfluent preschool children revealed the fluent group using more double-base transformations and both groups comparable on the distribution of usage for sentence frame types. (Author/KW)