The Diagnostic Evaluation of Language Variation (DELV) was originally developed to limit assessment bias for African American children, and has proven to be an unbiased comprehensive language assessment appropriate for all English-speaking children. DELV™–ST is an individually administered, two part screening test designed to assess 1) language variation status, and 2) diagnostic risk status. Part l determines if children between 4 and 12 years speak Mainstream American English (MAE). Part ll screens whether children between 4 and 9 years may be at risk for a language disorder.
DELV Screening Test (Seymour, Roeper, and de Villiers 2003a, 2018)
the DELV-Criterion Referenced (Seymour, Roeper, and de Villiers 2003b)
the DELV-Norm Referenced (Seymour, Roeper, and de Villiers 2005, 2018)
(author abstract)