title: Screening for Language Delay: Growth Trajectories of Language Ability in Low- and High-Performing Children.
abstract: This study investigated the stability and growth of preschool language skills and explores latent class analysis as an approach for identifying children at risk of language impairment.
  
  
  
  The authors present data from a large-scale 2-year longitudinal study, in which 600 children were assessed with a language-screening tool (LANGUAGE4) at age 4 years. A subsample (n = 206) was assessed on measures of sentence repetition, vocabulary, and grammatical knowledge at ages 4, 5, and 6 years.
  
  
  
  A global latent language factor showed a high degree of longitudinal stability in children between the ages of 4 to 6 years. A low-performing group showing a language deficit compared to their age peers at age 4 was identified on the basis of the LANGUAGE4. The growth-rates during this 2-year time period were parallel for the low-performing and 3 higher performing groups of children.
  
  
  
  There is strong stability in children's language skills between the ages of 4 and 6 years. The results demonstrate that a simple language screening measure can successfully identify a low-performing group of children who show persistent language weaknesses between the ages of 4 and 6 years.
authors: University of Oslo, NorwayStatped Sørøst, Norway.
authors: Marianne
authors: M
authors: Klem
authors: University of Oslo, Norway.
authors: Bente
authors: B
authors: Hagtvet
authors: University of Oslo, NorwayUniversity College London, United Kingdom.
authors: Charles
authors: C
authors: Hulme
authors: University of Oslo, NorwayUniversity of Gothenburg, Sweden.
authors: Jan-Eric
authors: JE
authors: Gustafsson
mesh_terms: D002648:Child; D002663:Child Language; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007805:Language Development Disorders / Q000175:diagnosis*; D007807:Language Tests; D008137:Longitudinal Studies; D008297:Male; D015233:Models, Statistical; D011379:Prognosis; D015203:Reproducibility of Results