Fourteen-Year Follow-Up of Children With and Without Speech/Language Impairments

TLDR

This 14‑year prospective study followed 242 community children—114 with speech and/or language impairments and 128 without—to assess their speech and language outcomes in young adulthood. Participants were identified at age 5 and subsequently assessed at ages 12 and 19 across communicative, cognitive, academic, behavioral, and psychiatric domains. Results showed persistent communication difficulties among those with a history of impairment, stable language performance over time, better long‑term outcomes for initial speech versus language impairments, and more favorable prognoses for specific language impairments compared to secondary deficits, findings that remained robust under varying criteria and align with earlier studies, thereby strengthening their prognostic utility.

Abstract

This report concerns the speech and language outcomes of young adults ( N = 242) who participated in a 14-year, prospective, longitudinal study of a community sample of children with ( n = 114) and without ( n = 128) speech and/or language impairments. Participants were initially identified at age 5 and subsequently followed at ages 12 and 19. Direct assessments were conducted in multiple domains (communicative, cognitive, academic, behavioral, and psychiatric) at all three time periods. Major findings included (a) high rates of continued communication difficulties in those with a history of impairment; (b) considerable stability in language performance over time; (c) better long-term outcomes for those with initial speech impairments than for those with language impairments; and (d) more favorable prognoses for those with specific language impairments than for those with impairments secondary to sensory, structural, neurological, or cognitive deficits. These general conclusions held when either a liberal or a more stringent criterion for language impairment was employed. Some of these findings are consistent with those from earlier follow-up studies, which used less optimal methods. Thus, the present replication and extension of these findings with a sound methodology enables greater confidence in their use for prognostic, planning, and research purposes.