Biomedical subjects

Bill Wells

Publications and source records attributed to Bill Wells.

6 recordsLinked to original sources

PubMed2004

Intonation development from five to thirteen.

Research undertaken to date suggests that important developments in the understanding and use of intonation may take place after the age of 5;0. The present study aims to provide a more comprehensive account of these developments. A specially designed battery of prosodic tasks was administered to four groups of thirty children, from London (U.K.), with mean ages of 5;6, 8;7, 10;10 and 13;9. The tasks tap comprehension and production of functional aspects of intonation, in four communicative areas: CHUNKING (i.e. prosodic phrasing), AFFECT, INTERACTION and FOCUS. Results indicate that there is considerable variability among children within each age band on most tasks. The ability to produce intonation functionally is largely established in five-year-olds, though some specific functional contrasts are not mastered until C.A. 8;7. Aspects of intonation comprehension continue to develop up to C.A. 10;10, correlating with measures of expressive and receptive language development.

Adolescent↗

PubMed2003

Intonation abilities of children with speech and language impairments.

Intonation has been little studied in children with speech and language impairments, although deficits in related aspects of prosody have been hypothesized to underlie specific language impairment. In this study a new intonation battery, the Profiling Elements of Prosodic Systems-Child version (PEPS-C), was administered to 18 children with speech and/or language impairments (LI). PEPS-C comprises 16 tasks (8 x 8, Input x Output) tapping phonetic and functional aspects of intonation in four areas: grammar, affect, interaction, and pragmatics. Scores were compared to a chronological age (CA) matched group of 28 children and a group of 18 children matched for language comprehension (LC). Measures of language comprehension, expressive language, nonverbal intelligence, and segmental phonology were also taken. The LI group did not score significantly below the LC group on any PEPS-C task. On 5 of 16 tasks, the LI group scored significantly lower than the CA group. In the LI group, there were just 2 significant correlations between a PEPS-C task and 1 of the nonprosodic measures. The results support the view that intonation is relatively discrete from other levels of speech and language while suggesting some specific areas of possible vulnerability: auditory memory for longer prosodic strings and the of prosody for pragmatic/interactional purposes.

Adult↗

PubMed2002

Between-word junctures in early multi-word speech.

Most children aged 1;6 to 2;0 begin to use utterances of two words or more. It is therefore important for child phonologists to consider the development of phonetic and phonological phenomena that characterize connected speech. The longitudinal case study reported here investigated three juncture types--assimilation, elision and liaison--in the speech of a typically-developing child between the ages of 2;4 and 3;4. Attempts at production of these adult juncture types occurred from the onset of two-word utterances. However, for some juncture types, the child still had to perfect the intergestural relationships and gestural articulations that the adult between-word junctures demand. This process of phonetic development was largely accomplished by the age of 3;4. With one exception, between-word junctures appear not to be the result of learned phonological rules or processes. The exception is liaison involving /r/, which did not occur until the child was three years old.

Child, Preschool↗

PubMed2002

From phonological therapy to phonological awareness.

Children with speech difficulties often have delayed phonological awareness development and associated literacy problems. Speech-language pathologists (S-LPs) typically use phonological and articulatory approaches in their treatment of such children. However, it is unclear to what extent phonological awareness training, originally designed to promote literacy skills, might also improve children's speech output. This article adopts a psycholinguistic approach to examine the nature and development of phonological awareness and to explore the relationship between phonological awareness training and phonological therapy. The role of phonological awareness in predicting literacy development in children is discussed, and principles for analyzing the psycholinguistic properties of therapy tasks are presented. Phonological awareness cannot be dealt with independently as it is an integral part of articulation and phonological intervention. Further, phonological awareness is a necessary "on-line" skill in the dynamic communication process between therapist and child. Failure to take this into account will result in inappropriately targeted therapy and pragmatic breakdown between the child and S-LP.

Articulation Disorders↗

PubMedDate not supplied

Investigating prosodic ability in Williams syndrome.

This paper investigates whether people with Williams syndrome (WS) have prosodic impairments affecting their expression and comprehension of four main uses of intonation. Two adolescent males with WS were assessed using the PEPS-C battery, which considers prosodic abilities within a psycholinguistic framework, assessing prosodic form and function in both the input and output domains. The performances of the subjects with WS were compared with control data for age and language-comprehension matched children. The results revealed significant prosodic impairment affecting all areas of the profile. Crucially, however, different profiles of strengths and weaknesses were revealed for the two subjects. The results support the growing view that WS is a heterogeneous population in terms of linguistic abilities.

Adolescent↗

PubMedDate not supplied

Phonological therapy within a psycholinguistic framework: promoting change in a child with persisting speech difficulties.

BACKGROUND: Single case studies are a valuable means of providing information about the outcomes of speech and language intervention. Many previous studies have used phonological analysis as a theoretical basis, while others have used psycholinguistic models. The present study combines these approaches to assessment, intervention and evaluation of outcomes. AIMS: The aim of the research was to determine if intensive psycholinguistically based intervention could result in (a) specific and (b) generalized improvements in the speech production of a child with severe and persisting phonological difficulties. METHODS AND PROCEDURES: A single subject research design was used with pre- and post-intervention assessment carried out. Assessment took place at two levels: the macro level focused on global change in the child's speech processing system using psycholinguistic speech profiling and phonological analyses; the micro assessment focused on specific, treated (and matched control) stimuli. There were three phases of intervention with a total of 30 hours of therapy. OUTCOMES AND RESULTS: Micro evaluation showed significant changes in Katy's single word and connected speech production--as well as in other areas such as spelling and auditory discrimination of closely related real word pairs. Macro evaluation revealed significant improvement in speech severity indices (PCC, PPC), and gains in her ability to discriminate between closely related real word pairs. These changes were maintained at follow-up seven months after intervention had ceased. CONCLUSIONS: Specific and intensive intervention brought about significant improvements in this child's speech, spelling and auditory discrimination at the micro level, and in speech and auditory discrimination at a macro level. The macro level assessments reveal persisting core deficits requiring further focused intervention before changes can be observed more widely. When carefully defined and evaluated, speech and language intervention can have positive outcomes for children with severe and persisting speech difficulties.

Articulation Disorders↗