title: Response time in 14-year-olds with language impairment.
abstract: OBJECTIVE
  To determine whether children with language impairment were slower than typically developing peers at age 14, and whether slowing, if present, was similar across task domains; whether differences in response time (RT) across domains were the same for children with specific language impairment (SLI) and nonspecific language impairment (NLI); and whether RT performance at age 9 predicted performance at age 14.
  
  
  METHODS
  Fourteen-year-old children with SLI (n = 20), NLI (n = 15), and typical development (NLD; n = 31) were administered several linguistic and nonlinguistic speeded tasks. The children had received the same tasks at age 9. RT performance was examined.
  
  
  RESULTS
  Both the SLI and the NLI groups were significantly slower than the NLD group in motor, nonverbal cognitive, and language task domains, and there was no significant difference among domains. Individual analyses showed that most, but not all, children with SLI and NLI were slower than the NLD group mean. Slowing at age 9 and age 14 were moderately correlated.
  
  
  CONCLUSIONS
  The results suggest that slow RT is a persistent characteristic of many children with language impairment; however, the nature of the relationship between RT and language performance requires further investigation.
authors.affiliation: Pennsylvania State University, University Park, PA 16802-3100, USA. cam47@psu.edu
authors.forename: Carol A
authors.initials: CA
authors.lastname: Miller
authors.forename: Laurence B
authors.initials: LB
authors.lastname: Leonard
authors.forename: Robert V
authors.initials: RV
authors.lastname: Kail
authors.forename: Xuyang
authors.initials: X
authors.lastname: Zhang
authors.forename: J Bruce
authors.initials: JB
authors.lastname: Tomblin
authors.forename: David J
authors.initials: DJ
authors.lastname: Francis
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007804:Language Development; D007806:Language Disorders / Q000503:physiopathology* / Q000628:therapy; D007807:Language Tests; D007808:Language Therapy / Q000379:methods; D008297:Male; D011237:Predictive Value of Tests; D011930:Reaction Time / Q000502:physiology*; D013647:Task Performance and Analysis