Profiles of language development in pre‐school children: a longitudinal latent class analysis of data from the Early Language in Victoria Study
- 24 March 2011
- journal article
- Published by Wiley in Child: Care, Health and Development
- Vol. 38 (3), 341-349
- https://doi.org/10.1111/j.1365-2214.2011.01234.x
Abstract
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.This publication has 25 references indexed in Scilit:
- Predicting Language Outcomes at 4 Years of Age: Findings From Early Language in Victoria StudyPEDIATRICS, 2010
- Predictors of early precocious talking: A prospective population studyJournal of Child Language, 2009
- The Early Language in Victoria Study (ELVS): A prospective, longitudinal study of communication skills and expressive vocabulary development at 8, 12 and 24 monthsInternational Journal of Speech-Language Pathology, 2009
- The Early Language in Victoria Study: predicting vocabulary at age one and two years from gesture and object useJournal of Child Language, 2008
- School ReadinessPEDIATRICS, 2008
- Deciding on the Number of Classes in Latent Class Analysis and Growth Mixture Modeling: A Monte Carlo Simulation StudyStructural Equation Modeling: A Multidisciplinary Journal, 2007
- Growth of infant communication between 8 and 12 months: A population studyJournal of Paediatrics and Child Health, 2006
- Screening for Speech and Language Delay in Preschool Children: Systematic Evidence Review for the US Preventive Services Task ForcePEDIATRICS, 2006
- Language Skills of Children with EBDJournal of Emotional and Behavioral Disorders, 2002
- Prevalence and natural history of primary speech and language delay: findings from a systematic review of the literatureInternational Journal of Language & Communication Disorders, 2000