Using cinefluorography, this investigation evaluated how the bilabial and dorsal stop closure postures of two hearing and five deaf adult speakers varied with vowel context. Results supported the suggestion that some speakers who learn speech without audition may develop a different articulatory coordination than hearing speakers. (Author/DB)

The use of cues to voicing perception of initial stop consonants in multiple spoken syllables was studied for moderately/severely hearing impaired (N=43) and normal-hearing listeners (N=12). Results confirmed that voice onset time was a strong voicing cue for both hearing impaired and normal hearing listeners. (Author/DB)

The study assessed the perceptual effects of a range of second and third formant transition rates that occur naturally in the production of /w/ and /r/ sounds by children and adults. No general support for this property as a salient perceptual cue was found in this study. (Author/DB)

Manipulation of speed of delivery and linguistic context followed by factor analysis of 11 measures of lingual activity involved in the production of the syllable /ka/ indicated three factors explained 75 percent of the variance: displacement/velocity, duration, and midsyllable duration and distance. (Author/DB)

Results indicated that in both adults and infants combined cues facilitate discrimination of the phonemic contrast regardless of whether the cues cooperate or conflict. The three experiments did not support a phonetic interpretation of conflicting/cooperating cues for the perception of final stop consonant voicing. (Author/DB)

The contribution of reduced speaking rate to the intelligibility of "clear" speech was evaluated by adjusting the durations of speech segments in various ways for both hard-of-hearing listeners and listeners with normal hearing. The intelligibility advantage of clear speech over conversational speech was confirmed for both groups of…

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"…

This study examined how five normally developing two-year-old children manage the relationship between phonetic production and production of word combinations in their spontaneous speech. Results revealed tradeoffs between complexity of word combinations and both accuracy of consonant production and phonetic complexity of individual lexical items.…

The ability to alter speaking rate was studied in nine adult subjects with amyotrophic lateral sclerosis and nine control subjects. Results suggest that the relationship between speaking rate, articulation rate, pause duration, and pause frequency remained largely intact for the dysarthric speakers. Data showed greater dependence on pausing by the…

Electropalatography (EPG) was used to obtain details of tongue contacts with the hard palate in four articulation-disordered children. EPG provided relevant diagnostic information, showing patterns in both spatial configuration and variability and allowing the tentative diagnosis of two children as verbal dyspraxic. (Author/DB)

To test opposing theories about the relationship between intonation and syllable timing, these boundary features were compared in a longitudinal study of 9 children's speech development between the mean ages of 16 and 25 months. Results suggest that young children acquire the skills that control intonation earlier than they do skills of final…

This article evaluates the "Frames, then Content" hypothesis for speech acquisition, which sees babbling as a direct result of producing syllabic "frames" by rhythmic mandibular oscillation with little of the "content" seen under mandible-independent control. Analysis of 6,659 utterances of 6 normally developing…

The occurrence of stuttering on stress-peak and unstressed syllables in connected speech was studied in 10 young adult stutterers. Results showed a significant coincidence of stutter events and syllabic stress peaks, particularly in polysyllabic words, though stuttering on the first three words of principal clauses appeared independent of syllabic…

The continuity in development of syllable duration patterns was examined in seven young children as they progressed from preword to multiword periods of vocalization development. Results revealed no systematic increase or decrease in the duration of bisyllables produced by the children as a group, whereas lengthening of final syllables was…

Four adults and 16 five-year-olds were asked to repeat words that differed in voicing of initial and final stop consonants and then to respond to revision requests. Children and adults decreased vowel duration and increased final closure duration in revised speech, regardless of the source of miscomprehension. (Author/JDD)