This study compared articulatory movements of 30 adolescents (12-16 years) and 30 young adults. Trajectory variability, especially lip trajectories, was higher for the adolescents. Adolescents also had significantly longer movement durations, lower velocities, smaller displacements, and greater variability on these measures than young adults. No…

The relationships between speech parameters and speech intelligibility of 40 severely to profoundly hearing-impaired adults were studied. Regression analysis revealed that speech intelligibility was predicted by a cognate-pair voice-onset-time difference measure and a measure of the stability of the volume-velocity rise time. (Author/JDD)

Analysis of speech samples from four-year-old monozygotic and dizygotic twins revealed that the monozygotic twins were significantly more likely to misproduce the same sound on an articulation test than were dizygotic twins. The dizygotic twins were no more likely to share errors than were children who were both genetically and environmentally…

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)

The three general approaches for measuring speech intelligibility in young children are open-set word identification, closed-set word identification, and rating scales. Positive and negative aspects of the various procedures for measuring speech intelligibility are discussed. (Author/DB)

This study examined effects of familiarity with a speech target on coarticulation magnitude in 30 young children and 10 adults. Children exhibited a greater effect of a following vowel on the preceding fricative than did adults. Nonmeaningful production items exhibited greater effects of the vowel on the preceding fricative than did meaningful…

Eight preschool children who underwent tracheotomy during the prelingual period were compared to matched controls on a variety of speech measures. Children with tracheotomies showed reduced acoustic vowel space, suggesting they were limited in their ability to produce extreme vocal tract configurations for vowels postdecannulation. Oral motor…

This study investigated developmental patterns of acquisition of the unrounded U.S. English vowels, by following 6 normally developing children from 22 to 30 months of age. Three classes of production errors were identified: intertrial production variability, context-sensitive substitutions, and context-free systematic substitution patterns.…

Measures of both temporal and spectral parameters were computed to determine the extent of perseveratory coarticulation in the vowel-consonant syllables produced by 7- and 10-year-old children (n=9). Profoundly hearing-impaired speakers exhibited measurable but smaller effects of perseveratory coarticulation relative to the normally hearing…

A case study describes the use of a facilitating phonetic context to decrease the occurrence of an unusual form of gliding. The process of differentiating the phones /l/ and /j/ involved systematic changes differing from the expected route of development. Results support the value of a key word approach in treating recalcitrant phonological…

Reviews textbook which focuses on disorders of language processing that can be viewed as generated by specific language impairments (SLI). Highlights the book's examination of root causes which may contribute to developmental language disorders for all components of language processing, as well as the interaction between the disorders. Finds the…

Two experiments examined phonological priming in children and adults using a cross-modal picture-word interference task. Pictures of familiar objects were presented on a computer screen, while interfering words were presented over headphones. Results indicate that priming effects reach a peak during a time when articulatory information is being…

Expressive language outcomes measured by MLU and the Index of Productive Syntax (IPSyn) at ages 3 and 4 were investigated in 34 late talkers with normal receptive language and in 16 typically developing comparison children matched on age, socioeconomic status, and nonverbal ability. Late talkers made greater gains than comparison children between…

The purpose of study was to investigate the impact of pre-surgical Infant Orthopaedics (IO) on consonant production at 18 months of age in children with Unilateral Cleft Lip and Palate (UCLP) and to compare the consonant production to that of age-matched children without clefts. The first ten children in a consecutive series of 20 with UCLP…

Thirty-one 8- and 9-year-old children selected for dyscalculia, reading difficulties or both, were compared to controls on a range of basic number processing tasks. Children with dyscalculia only had impaired performance on the tasks despite high-average performance on tests of IQ, vocabulary and working memory tasks. Children with reading…