Profiles of language development in pre-school children : a longitudinal latent class analysis of data from the early language in Victoria study

Background Pre-school language impairment is common and greatly reduces educational performance. Population attempts to identify children who would benefit from appropriately timed intervention might be improved by greater knowledge about the typical profiles of language development. Specifically, this could be used to help with the early identification of children who will be impaired on school entry.

Methods This study applied longitudinal latent class analysis to assessments at 8, 12, 24, 36 and 48 months on 1113 children from a population-based study, in order to identify classes exhibiting distinct communicative developmental profiles.

Results Five substantive classes were identified: Typical, i.e. development in the typical range at each age; Precocious (late), i.e. typical development in infancy followed by high probabilities of precocity from 24 months onwards; Impaired (early), i.e. high probabilities of impairment up to 12 months followed by typical language development thereafter; Impaired (late), i.e. typical development in infancy but impairment from 24 months onwards; Precocious (early), i.e. high probabilities of precocity in early life followed by typical language by 48 months. The entropy statistic (0.84) suggested classes were fairly well defined, although there was a non-trivial degree of uncertainty in classification of children. That half of the Impaired (late) class was expected to have typical language at 4 years and 6% of the numerically large Typical class was expected to be impaired at 4 years illustrates this. Characteristics indicative of social advantage were more commonly found in the classes with improving profiles.

Conclusions Developmental profiles show that some pre-schoolers' language is characterized by periods of accelerated development, slow development and catch-up growth. Given the uncertainty in classifying children into these profiles, use of this knowledge for identifying children who will be impaired on school entry is not straightforward. The findings do, however, indicate greater need for language enrichment programmes among disadvantaged children.

Engaging Deakin's international students in ongoing English language development

Universities in Australia, as with universities in the US and UK, are required more and more to adjust to student cohorts which represent a range of national, cultural and linguistic diversity. Many are concerned about the readiness of these students for study in an English-speaking medium and about their subsequent experiences and success. This presentation reports on the outcomes of “The English Language Growth” project, conducted across five Australian universities. This study, funded by the Australian Learning and Teaching Council (ALTC), represents the largest of its type in Australia. The project investigated the strategies that international students from non-English speaking backgrounds use to continue to improve their English once entering a university in Australia.

Young learners : teachers' questions and prompts as opportunities for children's language development

One highly regarded context for language learning is book reading, as teachers engage children in discussions around texts read. However, there is considerable variation in teachers’ patterns of talk that mediate this learning with preschool children’s oral language development dependent on the opportunities for engagement in language use provided by teachers. To explore the affordances of talk interactions within book reading a systematic analysis of teachers’ questions and children’s responses was undertaken. Results of this analysis show that the highest proportion of questions asked by this group of 18 preschool teachers were closed questions with a small proportion of open teaching questions asked. However, while open questions provided the most substantial opportunities for children’s extended talk, the range of questions asked provided opportunities for preschool teachers to extend children’s responses, support children’s understanding of the text, develop vocabulary and world knowledge, and to model more complex language structures.

Development of DAL and DAPL languages for building distributed applications

A common characteristic among parallel/distributed programming languages is that the one language is used to specify not only the overall organisation of the distributed application, but also the functionality of the application. That is, the connectivity and functionality of processes are specified within a single program. Connectivity and functionality are independent aspects of a distributed application. This thesis shows that these two aspects can be specified separately, therefore allowing application designers to freely concentrate on either aspect in a modular fashion. Two new programming languages have been developed for specifying each aspect. These languages are for loosely coupled distributed applications based on message passing, and have been designed to simplify distributed programming by completely removing all low level interprocess communication. A suite of languages and tools has been designed and developed. It includes the two new languages, parsers, a compilation system to generate intermediate C code that is compiled to binary object modules, a run-time system to create, manage and terminate several distributed applications, and a shell to communicate with the run-tune system. DAL (Distributed Application Language) and DAPL (Distributed Application Process Language) are the new programming languages for the specification and development of process oriented, asynchronous message passing, distributed applications. These two languages have been designed and developed as part of this doctorate in order to specify such distributed applications that execute on a cluster of computers. Both languages are used to specify orthogonal components of an application, on the one hand the organisation of processes that constitute an application, and on the other the interface and functionality of each process. Consequently, these components can be created in a modular fashion, individually and concurrently. The DAL language is used to specify not only the connectivity of all processes within an application, but also a cluster of computers for which the application executes. Furthermore, sub-clusters can be specified for individual processes of an application to constrain a process to a particular group of computers. The second language, DAPL, is used to specify the interface, functionality and data structures of application processes. In addition to these languages, a DAL parser, a DAPL parser, and a compilation system have been designed and developed (in this project). This compilation system takes DAL and DAPL programs to generate object modules based on machine code, one module for each application process. These object modules are used by the Distributed Application System (DAS) to instantiate and manage distributed applications. The DAS system is another new component of this project. The purpose of the DAS system is to create, manage, and terminate many distributed applications of similar and different configurations. The creation procedure incorporates the automatic allocation of processes to remote machines. Application management includes several operations such as deletion, addition, replacement, and movement of processes, and also detection and reaction to faults such as a processor crash. A DAS operator communicates with the DAS system via a textual shell called DASH (Distributed Application SHell). This suite of languages and tools allowed distributed applications of varying connectivity and functionality to be specified quickly and simply at a high level of abstraction. DAL and DAPL programs of several processes may require a few dozen lines to specify as compared to several hundred lines of equivalent C code that is generated by the compilation system. Furthermore, the DAL and DAPL compilation system is successful at generating binary object modules, and the DAS system succeeds in instantiating and managing several distributed applications on a cluster.

Procedural and declarative memory in children with and without specific language impairment

Background: Much evidence has accumulated to indicate memory deficits in children with specific language impairment. However, most research has focused on working memory impairments in these children. Less is known about the functioning of other memory systems in this population.

Aims: This study examined procedural and declarative memory in young children with and without specific language impairment.

Methods & Procedures: A total of 15 children with specific language impairment and 15 non-impaired children of comparable age, gender and handedness were presented with measures of procedural and declarative memory. Procedural memory was assessed using a Serial Reaction Time (SRT) Task in which children implicitly learnt a ten-item sequence pattern. Declarative memory for verbal and visual information was assessed using paired associative learning tasks.

Outcomes & Results: The results from the SRT Task showed the children with specific language impairment did not learn the sequence at levels comparable with the non-impaired children. On the measures of declarative memory, differences between the groups were observed on the verbal but not the visual task. The differences on the verbal declarative memory task were found after statistically controlling for differences in vocabulary and phonological short-term memory.

Conclusions & Implications: The results were interpreted to suggest an uneven profile of memory functioning in specific language impairment. On measures of declarative memory, specific language impairment appears to be associated with difficulties learning verbal information. At the same time, procedural memory is also appears to be impaired. Collectively, this study indicates multiple memory impairments in specific language impairment.

Outcomes of population based language promotion for slow to talk toddlers at ages 2 and 3 years: let’s learn language cluster randomised controlled trial

Objective To determine the benefits of a low intensity parent-toddler language promotion programme delivered to toddlers identified as slow to talk on screening in universal services.
Design Cluster randomised trial nested in a population based survey.
Setting Three local government areas in Melbourne, Australia.
Participants Parents attending 12 month well child checks over a six month period completed a baseline questionnaire. At 18 months, children at or below the 20th centile on an expressive vocabulary checklist entered the trial.
Intervention Maternal and child health centres (clusters) were randomly allocated to intervention (modified “You Make the Difference” programme over six weekly sessions) or control (“usual care”) arms.
Main outcome measures The primary outcome was expressive language (Preschool Language Scale-4) at 2 and 3 years; secondary outcomes were receptive language at 2 and 3 years, vocabulary checklist raw score at 2 and 3 years, Expressive Vocabulary Test at 3 years, and Child Behavior Checklist/1.5-5 raw score at 2 and 3 years.
Results 1217 parents completed the baseline survey; 1138 (93.5%) completed the 18 month checklist, when 301 (26.4%) children had vocabulary scores at or below the 20th centile and were randomised (158 intervention, 143 control). 115 (73%) intervention parents attended at least one session (mean 4.5 sessions), and most reported high satisfaction with the programme. Interim outcomes at age 2 years were similar in the two groups. Similarly, at age 3 years, adjusted mean differences (intervention−control) were −2.4 (95% confidence interval −6.2 to 1.4; P=0.21) for expressive language; −0.3 (−4.2 to 3.7; P=0.90) for receptive language; 4.1 (−2.3 to 10.6; P=0.21) for vocabulary checklist; −0.5 (−4.4 to 3.4; P=0.80) for Expressive Vocabulary Test; −0.1 (−1.6 to 1.4; P=0.86) for externalising behaviour problems; and −0.1 (−1.3 to 1.2; P=0. 92) for internalising behaviour problems.
Conclusion This community based programme targeting slow to talk toddlers was feasible and acceptable, but little evidence was found that it improved language or behaviour either immediately or at age 3 years.

Improving outcomes of preschool language delay in the community : protocol for the Language for Learning randomised controlled trial

Background

Early language delay is a high-prevalence condition of concern to parents and professionals. It may result in lifelong deficits not only in language function, but also in social, emotional/behavioural, academic and economic well-being. Such delays can lead to considerable costs to the individual, the family and to society more widely. The Language for Learning trial tests a population-based intervention in 4 year olds with measured language delay, to determine (1) if it improves language and associated outcomes at ages 5 and 6 years and (2) its cost-effectiveness for families and the health care system.

Methods/Design

A large-scale randomised trial of a year-long intervention targeting preschoolers with language delay, nested within a well-documented, prospective, population-based cohort of 1464 children in Melbourne, Australia. All children received a 1.25-1.5 hour formal language assessment at their 4th birthday. The 200 children with expressive and/or receptive language scores more than 1.25 standard deviations below the mean were randomised into intervention or ‘usual care’ control arms. The 20-session intervention program comprises 18 one-hour home-based therapeutic sessions in three 6-week blocks, an outcome assessment, and a final feed-back/forward planning session. The therapy utilises a ‘step up-step down’ therapeutic approach depending on the child’s language profile, severity and progress, with standardised, manualised activities covering the four language development domains of: vocabulary and grammar; narrative skills; comprehension monitoring; and phonological awareness/pre-literacy skills. Blinded follow-up assessments at ages 5 and 6 years measure the primary outcome of receptive and expressive language, and secondary outcomes of vocabulary, narrative, and phonological skills.

Discussion

A key strength of this robust study is the implementation of a therapeutic framework that provides a standardised yet tailored approach for each child, with a focus on specific language domains known to be associated with later language and literacy. The trial responds to identified evidence gaps, has outcomes of direct relevance to families and the community, includes a well-developed economic analysis, and has the potential to improve long-term consequences of early language delay within a public health framework.

Oral language competence, young speakers and the Law

Purpose: This paper highlights the forensic implications of language impairment in 2 key (and overlapping) groups of young people: identified victims of maltreatment (abuse and/or neglect) and young offenders.

Method: Two lines of research pertaining to oral language competence and young people's interface with the law are considered: 1 regarding investigative interviewing with children as victims or witnesses in the context of serious allegations of sexual abuse, and the other pertaining to adolescent offenders as suspects, witnesses, or victims. The linguistic demands that forensic interviewing places on these young people are also considered. Literature concerning the impact of early maltreatment on early language acquisition is briefly reviewed, as is the role of theory of mind in relation to the requirements of investigative interviewing of children and adolescents.

Implications: High-risk young people (i.e., those who are subject to child protection orders because of suspected or confirmed maltreatment, and those who are engaged with the youth justice system) face an elevated risk for suboptimal language development but may need to draw on their language skills in high-stakes forensic interviews. Implications for early intervention policy and practice are identified, and the need for greater speech-language pathology advocacy and engagement in forensic interviewing research is emphasized.

Global English corner : using Elluminate to enhance international students' English language skills

Students at Victoria University (VU) in Melbourne, Australia, undertake their study in an English language context and they have a range of support options to assist with English language development. VU has partner universities in China (Sichuan University, Henan University and Liaoning University). VU’s programs in China often have fewer language support options than programs in Melbourne. The Australian Government’s Transnational Quality Strategy requires that educational programs on- and offshore provide students with a comparable learning experience. Given the relative lack of English speaking opportunities available to VU’s students in China, the university is exploring how technologies might achieve a greater comparability of the student experience. This paper reports on a pilot program that uses Elluminate to conduct English conversations between students in China and Australia. The perceived lack of English competence of international students has been an ongoing issue in Australian higher education while the ‘English corner’ is ‘a characteristically Chinese approach to informal practice’ (Jin & Cortazzi, 2002) that helps students learning English in a foreign context to develop their English language proficiency. How might the idea of ‘English corner’ be used with educational technologies to encourage international students to practise and develop their English? This paper discusses a pilot program at VU that combines the idea of the English Corner together with the online conferencing tool Elluminate and a blog developed in WordPress, to engage Chinese students offshore in English language conversations. Through Elluminate and the Global English Corner blog, a pair of student peers in Melbourne conducts semi-structured conversations with groups of students offshore. In Elluminate, students can both hear and see each other – and they can simultaneously txt chat, share documents, images and websites and use the collaborative whiteboard function of Elluminate – to have dynamic conversations in real time. Preliminary findings of this pilot that uses technology to emphasise the societal aspects of learning – including language learning – will be presented. The discussion will consider how a more widespread English Corner program could aid the transition of international students in Australia, encourage the interaction of local students and international students, increase opportunities for international students to practise English and achieve a greater comparability of language support options on- and offshore.

"It's got to be more than that". Parents and speech-language pathologists discuss training content for families with a new speech generating device.

PURPOSE: Although parent-implemented interventions for children with a speech-generating device (SGD) have been well researched, little is known about parents' or speech-language pathologists' (SLPs) views around parent training content. In this project, we aimed to identify areas that parents and SLPs consider should be included in training for families with a new SGD.

METHODS: Seven parents of children with an SGD and three SLPs who were new to the SGD field, participated in individual semi-structured interviews. Ten SLPs experienced in SGD practice took part in two focus groups. Data were analysed using grounded theory methods.

RESULTS: Participants identified the following areas suitable for inclusion in a family SGD training package: (a) content aimed at improving acceptance and uptake of the SGD, including technical guidance, customisation and reassurance around SGD misconceptions; (b) content around aided language development and (c) home practice strategies, including responsivity, aided language stimulation and managing children's motivation.

CONCLUSIONS: Participants identified diverse training targets, many of which are unexplored in parent-training research to date. Their recounted experiences illustrate the diversity of family capacity, knowledge and training priorities, and highlight the need for collaborative planning between families and SLPs at all stages of SGD training. Implications for Rehabilitation Training needs for families with a new speech generating device (SGD) are diverse, ranging from technology-specific competencies to broader areas, such as advocacy, teamwork and goal-setting skills. Each family with a new SGD will have a unique profile of training needs, determined by individual learning capacity, priorities, prior knowledge and experience, as well as their child's current communication skills and future support needs. Parents and speech-language pathologists (SLPs) may hold different priorities concerning family SGD training, necessitating ongoing team discussion.

Building a model of support for preschool children with speech and language disorders

Speech and language disorders impede young children’s abilities to communicate and are often associated with a number of behavioural problems arising in the preschool classroom. This paper reports a small-scale study that investigated 23 Australian educators’ and 7 Speech Pathologists’ experiences in working with three to five year old children with speech and language disorders. The participants responded to a questionnaire relating to the types of SaLD; social and emotional challenges experienced by children; their role in providing support and issues confronting both professions. The findings highlighted that educators play a valuable role in supporting children’s speech and language disorders through the social context of the preschool classroom. Furthermore inter-professional practice between Speech Pathologists and educators was viewed as highly valuable. Drawing upon these findings, a model of support is presented to improve interventions for holistic development.

Systematic review of sedentary behavior and cognitive development in early childhood

OBJECTIVE: To comprehensively review observational and experimental studies examining the relationship between sedentary behavior and cognitive development during early childhood (birth to 5years). METHOD: Electronic databases were searched in July, 2014 and no limits were imposed on the search. Included studies had to be peer-reviewed, published, and meet the a priori determined population (apparently healthy children aged birth to 5years), intervention (duration, types, and patterns of sedentary behavior), comparator (various durations, types, or patterns of sedentary behavior), and outcome (cognitive development) study criteria. Data extraction occurred in October and November 2014 and study quality and risk of bias were assessed in December 2014. RESULTS: A total of 37 studies, representing 14,487 participants from nine different countries were included. Thirty-one studies used observational study designs and six studies used experimental study designs. Across study designs, increased or higher screen time (most commonly assessed as television viewing (TV)), reading, child-specific TV content, and adult-specific TV content had detrimental (negative) associations with cognitive development outcomes for 38%, 0%, 8%, and 25% of associations reported, respectively, and beneficial (positive) associations with cognitive development outcomes for 6%, 60%, 13%, and 3% of associations reported, respectively. Ten studies were moderate quality and 27 studies were weak quality. CONCLUSIONS: The type of sedentary behavior, such as TV versus reading, may have different impacts on cognitive development in early childhood. Future research with reliable and valid tools and adequate sample sizes that examine multiple cognitive domains (e.g., language, spatial cognition, executive function, memory) are needed. Registration no. CRD42014010004.

Representing the mind: adult talk to speech-delayed preschoolers

There is evidence from a range of studies that adult input influences a young child's language development Of interest is how adult input contributes to emotional and cognitive understandings. Children with special needs in mainstream schools are expected to develop social skills which entails the understanding of a situation from the perspective of other participants. The question is whether children with a speech delay hear adult language that helps them develop a theory of mind. The study of the acquisition of a theory of mind has focused on children who have been asked to carry out tasks demonstrating their understanding of what another person might be thinking. Tager-Flusberg et al. (2001) have found that children who perform better on theory of mind tasks are children who talk about thoughts and feelings. The present study looks at mental state language input provided to children that might help them learn to talk about thoughts and feelings. Activities involving children and their mothers, and activities in a preschool program were studied for cognitive and emotional content in the adult input. The input provided to normally developing children would be more supportive of the development of their talk about thoughts and feelings.