Predicting vocabulary growth in children with and without specific Language impairment

A longitudinal study from 2;6 to 21 years of age

Mabel L. Rice, Lesa R Hoffman

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Purpose: Children with specific language impairment (SLI) often have vocabulary impairments. This study evaluates longitudinal growth in a latent trait of receptive vocabulary in affected and unaffected children ages 2;6 (years;months) to 21 years and evaluates as possible predictors maternal education, child gender, and nonverbal IQ. Method: A sample of 519 participants (240 with SLI; 279 unaffected) received an average of 7 annual assessments for a total of 3,012 latent trait Peabody Picture Vocabulary Test (PPVT) observations. Unconditional and conditional multilevel growth models were estimated to evaluate growth trajectories and predictor relationships over time. Results: Children with SLI had lower levels of receptive vocabulary throughout the age range assessed. They did not close the gap with age peers. Children with higher nonverbal IQs had better PPVT performance, as did children of mothers with higher education. Child gender showed an advantage for young girls that leveled out with age and then became an advantage for boys from ages 10 to 21 years. All children’s rate of vocabulary acquisition slowed around 12 years of age. Conclusions: The outcomes of the study have implications for hypothesized causal pathways for individual differences; predictions differ for children under 5 years, 6–10 years, and later ages.

Original languageEnglish (US)
Pages (from-to)345-359
Number of pages15
JournalJournal of Speech, Language, and Hearing Research
Volume58
Issue number2
DOIs
StatePublished - Apr 1 2015

Fingerprint

Vocabulary
Longitudinal Studies
vocabulary
longitudinal study
Language
Growth
language
Language Tests
Mothers
child education
Education
gender
Specific Language Impairment
Longitudinal Study
Individuality
Outcome Assessment (Health Care)
performance
education

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing

Cite this

Predicting vocabulary growth in children with and without specific Language impairment : A longitudinal study from 2;6 to 21 years of age. / Rice, Mabel L.; Hoffman, Lesa R.

In: Journal of Speech, Language, and Hearing Research, Vol. 58, No. 2, 01.04.2015, p. 345-359.

Research output: Contribution to journalArticle

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