The purpose of this study was to explore the production of infinitival complements by children with specific language impairment (SLI) as compared with mean length of utterance (MLU)-matched children in an effort to clarify inconsistencies in the literature. Spontaneous language samples were analysed for infinitival complements (reduced…

This study investigated the use of cognitive state verbs (CSVs) and complement clauses in children with specific language impairment (SLI) and their typically developing (TD) peers. In Study 1, conversational samples from 23 children with SLI (M = 6;2), 24 age-matched TD children (M = 6;2) and 21 vocabulary-matched TD children (M = 4;9) were…

A recurring difficulty for researchers using electropalatography (EPG) is the wide variation in spatial patterns that occurs between speakers. High inter-speaker variability, combined with small numbers of participants, makes it problematic (1) to identify differences in tongue-palate contact across groups of speakers and (2) to define "normal"…

Articulation rate, speaking rate, as well as the duration and location of pauses, were analysed in 10 children with specific language impairment (SLI) and a comparison group of seven younger children producing utterances of similar lengths. Children with SLI were significantly slower in articulation rate, but not speaking rate or pausing time,…

Psycholinguistic studies dealing with Alzheimer's disease (AD) commonly consider verbal aspects of language. In this article, we investigated both verbal and non-verbal aspects of speech production in AD. We used pauses and hesitations as markers of planning difficulties and hypothesized that AD patients show different patterns in the process of…

Phonological acquisition traditionally has been measured using constructs that focus on segments rather than the whole words. Findings from recent research have suggested whole-word productions be evaluated using measures such as phonological mean length of utterance (pMLU) and the proportion of whole-word proximity (PWP). These measures have been…

This study investigated social knowledge in school-age children, aged 8-12 years, with and without language impairment (LI and TD groups). A hypothetical peer conflict task was administered to examine the relationship among prosocial responses and parent/teacher ratings of children's social behaviours. Stimuli included 12 hypothetical peer…

The comparison of cognitive and linguistic skills in individuals with developmental disorders is fraught with methodological and psychometric difficulties. In this paper, we illustrate some of these issues by comparing the receptive vocabulary knowledge and non-verbal reasoning abilities of 41 children with Williams syndrome, a genetic disorder in…

Previous studies document an influence of phonological knowledge on word learning that differs across development. Specifically, children with expressive lexicons of fewer than 50 words learn words composed of IN sounds more rapidly than those composed of OUT sounds. In contrast, preschool children with larger expressive lexicons show the reverse…