Which statement best differentiates a developmental language disorder from language impairment due to a neurological condition?

• A. Developmental language disorder shows persistent language difficulties without other neurodevelopmental or neurological signs; neurological conditions show additional motor, cognitive, hearing, or imaging abnormalities.
• B. Developmental language disorder is always accompanied by seizures.
• C. Neurological language impairments improve spontaneously by age 4.
• D. Developmental language disorder only affects written language.

Answer: (A)

The key idea is distinguishing an isolated language difficulty from language problems that come with a broader neurological picture. A developmental language disorder is characterized by persistent language difficulties that occur without accompanying neurodevelopmental or neurological signs—there aren’t additional motor, cognitive, hearing, or brain-imaging abnormalities explaining the language problems. When language impairments are due to a neurological condition, you’d expect other signs or findings beyond language itself, such as motor delays or abnormalities, cognitive or learning difficulties, hearing issues, or abnormal imaging results.

Seizures aren’t a defining feature of developmental language disorder, so they don’t help separate the two. Neurological language impairments don’t universally improve by age four; outcomes vary and aren’t guaranteed to normalize. And developmental language disorder isn’t limited to written language—it primarily affects oral language domains like vocabulary, grammar, and use, with reading and writing potentially affected secondarily.