Language delay is not predictable from available risk factors

FATORES DE RISCO E DE PROTEÇÃO PARA ATRASOS NO DESENVOLVIMENTO DA LINGUAGEM

O objetivo deste trabalho foi elencar fatores de risco e de proteção que, segundo a literatura nacional e internacional, estão associados com atrasos no desenvolvimento da linguagem oral de crianças. Foi desenvolvida uma revisão integrativa da literatura, nas bases de dados Lilacs, PsycINFO e Web of Science. A busca resultou em 12 artigos que atendiam aos critérios de seleção. A maioria dos trabalhos identificou fatores de risco estáticos, os quais são principalmente variáveis biológicas, ou da história de vida da criança. Um número menor de pesquisas investigou fatores de risco dinâmicos e fatores de proteção, dentre os quais foi ressaltado o suporte social oferecido à criança. Conhecer quais fatores estão relacionados a esses atrasos é imprescindível para a formulação de propostas que objetivem um desenvolvimento adequado da linguagem. São discutidas lacunas na literatura e a necessidade de novas pesquisas que atentem para o rigor metodológico, considerando a importância dessa discussão para eventuais intervenções.

Prediction of the outcome of children who had a language delay at age 2 when they are aged 4: Still a challenge

PURPOSE

This study investigated the role that variables related to children and their environment play in the prediction of outcomes at 4 years of age for children with a language delay at 2 years.

METHOD

A longitudinal study was undertaken where 64 children (45 boys, 19 girls; mean age = 53.3 months; SD = 4.4) with language delay at age 2 years were re-evaluated at age 4 years. Three developmental trajectories were analysed.

RESULT

The early stages of grammar, as estimated by mean length of utterance at 3.5 years, are an important prognosis factor of subsequent language impairment (LI). Children who are exposed to several risk factors simultaneously are more likely to have a language delay (LD) or a LI, but the profile of LD children is more akin to that of the typically developing (TD) children. Children with LI tend to have profiles with a greater number of risk factors.

CONCLUSION

The results of this study encourage different intervention approaches depending on the child's language profile at 2 years, due to differing language prognosis. The results also point to the need to assess the child's environment. Future studies with large diverse population samples may give more precise information on potential risk factors and their cumulative effect.

International variation in programmes for assessment of children's neurodevelopment in the community: Understanding disparate approaches to evaluation of motor, social, emotional, behavioural and cognitive function

BACKGROUND

Few areas of medicine demonstrate such international divergence as child development screening and surveillance. Many countries have nationally mandated surveillance policies, but the content of programmes and mechanisms for delivery vary enormously. The cost of programmes is substantial but no economic evaluations have been carried out. We have critically examined the history, underlying philosophy, content and delivery of programmes for child development assessment in five countries with comprehensive publicly funded health services (Denmark, Finland, Norway, Scotland and Sweden). The specific focus of this article is on motor, social, emotional, behavioural and global cognitive functioning including language.

FINDINGS

Variations in developmental surveillance programmes are substantially explained by historical factors and gradual evolution although Scotland has undergone radical changes in approach. No elements of universal developmental assessment programmes meet World Health Organization screening criteria, although some assessments are configured as screening activities. The roles of doctors and nurses vary greatly by country as do the timing, content and likely costs of programmes. Inter-professional communication presents challenges to all the studied health services. No programme has evidence for improved health outcomes or cost effectiveness.

CONCLUSIONS

Developmental surveillance programmes vary greatly and their structure appears to be driven by historical factors as much as by evidence. Consensus should be reached about which surveillance activities constitute screening, and the predictive validity of these components needs to be established and judged against World Health Organization screening criteria. Costs and consequences of specific programmes should be assessed, and the issue of inter-professional communication about children at remediable developmental risk should be prioritised.

Utility of a Language Screening Measure for Predicting Risk for Language Impairment in Bilinguals

PURPOSE

This study evaluated the accuracy of an experimental version of the Bilingual English Spanish Oral Screener (BESOS; Peña, Bedore, Iglesias, Gutiérrez-Clellen, & Goldstein, 2008) for predicting the long-term risk for language impairment (LI) for a matched group of preschool-aged Spanish-English bilingual children with and without LI.

METHOD

A total of 1,029 Spanish-English bilingual children completed the BESOS before entering kindergarten. A subset of 167 participants completed a follow-up language evaluation in 1st grade. Twenty-one of these children were identified as having LI and were matched to a group of 21 typically developing peers from the larger sample. A series of discriminant analyses were used to determine the combination of scores on the BESOS that most accurately predicted 2 years later which children presented with and without LI.

RESULTS

The linear combination of the semantics and morphosyntax scores in the best language resulted in predictive sensitivity of 95.2% and predictive specificity of 71.4%, with an overall accuracy of 81% for predicting risk for LI.

CONCLUSION

A bilingual language screener administered before kindergarten can be useful for predicting risk for LI in bilingual children in 1st grade.

Measurement Issues: Assessing language skills in young children

BACKGROUND

Language and communication skills are central to children's ability to engage in social relationships and access learning experiences. This paper identifies issues which practitioners and researchers should consider when assessing language skills. A range of current language assessments is reviewed.

KEY FINDINGS

Current screening measures do not meet psychometric prerequisites to identify language problems. There are significant challenges in the interpretation of language assessments, where socioeconomic status, language status and dialect, hearing impairment and test characteristics impact results.

CONCLUSIONS

Psychometrically sound assessments of language are an essential component of developing effective and efficient interventions. The language trajectories of preschool children vary substantially; current screening measures have significant limitations. Composite measures of language performance are better indicators of language problems and disorders than single measures of component skills.

Evaluating a web-based clinical decision support system for language disorders screening in a nursery school

Background

Early and effective identification of developmental disorders during childhood remains a critical task for the international community. The second highest prevalence of common developmental disorders in children are language delays, which are frequently the first symptoms of a possible disorder.

Objective

This paper evaluates a Web-based Clinical Decision Support System (CDSS) whose aim is to enhance the screening of language disorders at a nursery school. The common lack of early diagnosis of language disorders led us to deploy an easy-to-use CDSS in order to evaluate its accuracy in early detection of language pathologies. This CDSS can be used by pediatricians to support the screening of language disorders in primary care.

Methods

This paper details the evaluation results of the “Gades” CDSS at a nursery school with 146 children, 12 educators, and 1 language therapist. The methodology embraces two consecutive phases. The first stage involves the observation of each child’s language abilities, carried out by the educators, to facilitate the evaluation of language acquisition level performed by a language therapist. Next, the same language therapist evaluates the reliability of the observed results.

Results

The Gades CDSS was integrated to provide the language therapist with the required clinical information. The validation process showed a global 83.6% (122/146) success rate in language evaluation and a 7% (7/94) rate of non-accepted system decisions within the range of children from 0 to 3 years old. The system helped language therapists to identify new children with potential disorders who required further evaluation. This process will revalidate the CDSS output and allow the enhancement of early detection of language disorders in children. The system does need minor refinement, since the therapists disagreed with some questions from the CDSS knowledge base (KB) and suggested adding a few questions about speech production and pragmatic abilities. The refinement of the KB will address these issues and include the requested improvements, with the support of the experts who took part in the original KB development.

Conclusions

This research demonstrated the benefit of a Web-based CDSS to monitor children’s neurodevelopment via the early detection of language delays at a nursery school. Current next steps focus on the design of a model that includes pseudo auto-learning capacity, supervised by experts.