The purpose of the present study was (1) to determine whether speech rate, utterance length, and grammatical complexity (number of clauses and clausal constituents per utterance) influenced stuttering-like disfluencies as children became more disfluent at the end of a 1200-syllable speech sample [Sawyer, J., & Yairi, E. (2006). "The effect of…

Evaluation of 10 stutterers and 10 nonstutterers (all adults) on masking level differences (MLD) and synthetic sentence identification tasks indicated that stutterers produced significantly poorer MLDs than nonstutterers. There were no significant differences on the synthetic sentence identification task. (Author/DB)

This study was designed to investigate if persons who stutter differ from persons who do not stutter in the coproduction of different types of consonant clusters, as measured in the number of dysfluencies and incorrect speech productions, in speech reaction times and in word durations. Based on the Gestural Phonology Model of Browman and…

This study of 14 school-age children who stuttered found that the average duration of stuttering was approximately three-quarters of a second and was not correlated with age, length of post-onset interval, or frequency of speech disfluency. Stuttering duration may be related to amount of sound prolongations as well as articulatory rate during…

This paper argues against definitions of stuttering which imply that all within-word disfluencies are stuttering and no between-word disfluencies are stuttering. The paper calls for a definition of stuttering that is not contradicted by available empirical information or clinical experience and is logically consistent. (JDD)

Fluent speakers and stutterer's increased voice level were analyzed in response to voice-delayed auditory feedback, an Edinburgh masker, and white noise. These results are used to assess auditory feedback monitoring accounts of speech behavior of fluent speakers and stutterers with some implications for the treatment of stuttering. (37 references)…

Describes an apparatus which combines auditory masking, metronomic pacing, and uninterrupted masking in a single unit to aid the stammerer. (MB)

The study found that stutterers (N=10) were significantly more variable than nonstutterers in their ability to achieve stable fundamental frequency diminution patterns in vowels immediately following stop consonants. Stutterers were not significantly different from the nonstutterers in their ability to achieve a stable fundamental frequency over…

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)

Electrodermal activity, peripheral blood flow, and heart rate were recorded from 19 adult stutterers and 19 normal speakers during performance of jaw movements. There were no differences between the two groups of speakers, suggesting that the stutterers did not have abnormally high levels of autonomic activation in speech. (Author/DB)

This investigation compared changes in articulatory rate over a period of 2 years in subgroups of preschool children who stutter (either persistently or who recovered without intervention) and normally fluent children. Results indicated no significant differences among the three groups when articulation rate was measured in syllables per second,…

This work investigated whether stuttering and nonstuttering adults differ in the coordination of oral and laryngeal movements during the production of perceptually fluent speech. This question was addressed by completing correlation analyses that extended previous acoustic studies by others as well as inferential analyses based on the…

Consideration of directions for future research in stuttering. (CH)

Investigates the influence of word abstraction, part of speech, word length, and word frequency on the amount of non-fluencies of stuttering subjects. (RB)