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ERIC Number: EJ1060014
Record Type: Journal
Publication Date: 2015-Apr
Pages: 15
Abstractor: As Provided
Reference Count: N/A
ISSN: ISSN-1092-4388
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
Journal of Speech, Language, and Hearing Research, v58 n2 p345-359 Apr 2015
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.
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: National Institutes of Health (DHHS)
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Peabody Picture Vocabulary Test
IES Grant or Contract Numbers: RO1DC001803|P30DC005803|P30HD002528