The study with three adult stutterers evaluated the effects of instructions to rate and modify the naturalness of their speech and compared their self evaluations with evaluations of listeners. (Author/DB)

This paper reviews the prominent concepts of the stuttering event and concerns about the reliability of stuttering event measurements, specifically interjudge agreement. Recent attempts to resolve the stuttering measurement problem are reviewed, and the implications of developing an improved measurement system are discussed. (Author/JDD)

This study determined through psychophysical comparison of scaling data that speech naturalness judgments of stutterers and nonstutterers from audiovisual recordings form a metathetic (or qualitative) rather than prothetic (or quantitative) continuum. Both direct magnitude estimation and equal-appearing interval scaling were valid, but interval…

This article critiques the previous research of Miller and Watson (1992) which concluded there were no significant differences between stutterers and nonstutterers on measures of anxiety or depression. It notes confounding effects of previous treatment, self-diagnosis, and low number of subjects. It then offers guidelines for conducting more valid…

This response to Ashley Craig's critique (EC 608 043) of the authors' research (which found no significant differences on measures of anxiety and depression between stutterers and nonstutterers) refutes Craig's claim that results were confounded by subjects' previous treatment, self-diagnosis, and low number. (DB)

This preliminary investigation of stuttering development and maturation of speech motor processes recorded the electromyographic activity of the orofacial muscles of nine children who stuttered. Results suggest that the emergence of tremor-like instabilities in the speech motor processes of stuttering children may coincide with aspects of general…

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.…

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 interjudge agreement levels for five adult listeners assessing either overt stuttering or disfluency types in the spontaneous speech of eight young children. Results showed that the interjudge reliability for judgments based on a disfluency taxonomy was not significantly different from that based on stuttering. The importance…

Preliminary findings from a longitudinal study of 32 preschool children who stutter and 32 nonstuttering controls reveal 4 subgroups: (1) persistent stuttering; (2) late recovery; (3) early recovery; and (4) control. Comparative data for the groups regarding frequency of disfluency, acoustic features, phonologic skills, language development,…

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,…

In this study, 30 judges identified disfluency types they perceived in audiovisually recorded speech stimuli, first individually and then with a partner. Although intrapair and interpair agreement was higher in the partner than the individual condition, agreement for occurrences still averaged below 50 percent. Findings suggest caution in use of…

Event-related brain potentials (ERPs), judgment accuracy, and reaction times (RTs) were obtained for 11 adults who stutter and 11 normally fluent speakers as they performed a rhyme judgment task of visually presented word pairs. Half of the word pairs (i.e., prime and target) were phonologically and orthographically congruent across words. That…

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…