Grounded in the biopsychosocial models of expressive language in autism spectrum disorder (ASD) and fragile X syndrome (FXS), this dissertation included two novel studies that examined the role of biological (i.e., physiology), psychological (i.e., autistic traits, anxiety symptoms, and child affect) and social (i.e., communication partner…

Oral language skills underpin children's educational success and enhance positive life outcomes. Yet, significant numbers of children struggle to develop competence in speaking and listening, especially those from areas of high economic deprivation. A tiered intervention model, graduating the level of provision in line with levels of need, has…

Background: Individuals with Williams syndrome (WS) show a disharmonic linguistic profile with a clear pattern of strengths and weaknesses. Despite their sociable nature, atypical socio-communicative abilities and deficits in communication and relationship with others have been found. Aim: The aim of the present study was to investigate whether…

Adult responsiveness is related to language development both in young typically developing children and in children with autism spectrum disorders, such that parents who use more responsive language with their children have children who develop better language skills over time. This study used a micro-analytic technique to examine how two facets…

Research on language in individuals with Williams syndrome (WS) has been fueled by persistent theoretical controversies for two decades. These shifted from initial focus on dissociations between language and cognition functions, to examining the paradox of socio-communicative impairments despite high sociability and relatively proficient…

Naturalistic interventions show promise for improving language in children with autism. Specific interventions differ in direct elicitation of child language and indirect language stimulation, and thus may produce different language outcomes. This study compared the effects of responsive interaction, milieu teaching, and a combined intervention on…

Teaching grammar in a way that enables students to use grammatical structures correctly in their active use has always been one of the intricate tasks for most practitioners. This study compared the effectiveness of three instructional methods: games, dialogues practiced through role-play, and unfocused tasks for teaching grammar. Forty-eight…

Background: There is a lack of empirical research investigating challenging behaviour in children with autism with severe speech impairments in naturalistic settings. The aim of the present study was to investigate challenging behaviour among Australian and Taiwanese children with autism who are non-verbal or have limited speech (i.e. less than…

This study examined repair strategies used by boys with language impairments, in response to clarification requests following conversational breakdowns. Five subjects, aged four-five, were compared with five age-matched controls and five controls matched for verbal competence. Results showed that all three groups overwhelmingly used revisions to…

Seven aphasic and seven normal adults described cartoon drawings and received one of three types of feedback (explicit, false, or implicit). Subjects' recodings showed that normal subjects used more expansion and deletion than aphasics. No significant differences existed between groups for repetition or revision. Subjects' responses varied…

This study compared the conversational repair strategies employed by eight language-impaired children, aged 7-11, and their linguistically normal age- and language-matched peers. All of the subjects appeared to recognize the obligatory nature of the neutral clarification requests employed, though performance differences were noted relating to…

This article on sampling early semantic productions reports a study of 6 children (ages 31-35 months) with specific language impairments. Subjects produced a greater frequency and diversity of multiword utterances in a free-play sampling situation than in a joint action routine sampling situation. (JDD)

This article presents data from a research study designed to compare the achievements of teenagers with Down syndrome educated in mainstream classrooms or in special education classrooms throughout their full-time education. Progress is reported for speech and language, literacy, socialisation, daily living skills and behaviour. For all the…