Establishing Language Benchmarks for Children With Typically Developing Language and Children With Language...

Area of Science:

• Child Language Development
• Speech-Language Pathology
• Developmental Psychology

Background:

• Stakeholders require empirically driven methods to measure children's language growth.
• Current methods for assessing language outcomes lack empirical grounding.
• There is a need for standardized language benchmarks for children aged 3-9.

Purpose of the Study:

• To establish language benchmarks for children with typically developing language (TDL).
• To establish language benchmarks for children with language impairment (LI).
• To provide empirically based tools for stakeholders in child language development.

Main Methods:

• Calculated effect sizes for grammar, vocabulary, and overall language in TDL children (n=20,018) using 8 norm-referenced language measures.
• Calculated effect sizes for LI children (n=497) using fall and spring norm-referenced language measures.
• Analyzed data from children receiving standard therapy in public schools.

Main Results:

• Preschoolers showed larger effect sizes (d=0.82, 0.70) compared to school-age children (d=0.49, 0.55).
• Considerable variability in expected language change was observed over time in both TDL and LI samples.
• Effect sizes differed between grammar, vocabulary, and overall language measures.

Conclusions:

• This study provides the first empirical language benchmarks for children aged 3-9.
• The data serve as an initial tool for practitioners, policymakers, and researchers.
• Benchmarks aid in setting growth goals, informing curriculum decisions, and measuring intervention effectiveness.