A comparison of two dynamic assessment situations for detecting development language disorder in monolingual and bilingual children.

Bilingual children's language skills are strongly influenced by exposure to each of their languages, among other linguistic, environmental, and cognitive factors. In the speech and language therapy clinic, it is difficult to disentangle developmental language disorders from insufficient exposure. Dynamic assessment, which directly tests the learning potential of children, offers a promising solution for this dilemma. This study compares the clinical potential of two dynamic assessment situations, varying amount of adult mediation (autonomous computer game vs. interactive story reading with graduated cues), as well as item types (nouns, verbs, and inflections in sentences) and linguistic modalities and tasks (comprehension - word picture matching and acceptability judgement, production - free recall and picture naming). Forty-nine French monolingual and French-Portuguese bilingual children with and without developmental language disorder, aged 5;0 to 7;11 years, were include in the final analyses. Using Lasso regressions, we were able to determine which variables best explain the presence of disorder. A combination of all item types and predominantly receptive tasks, mostly from the interactive situation, was retained for very high classification accuracy (up to 100% sensitivity and 96% specificity). Language status showed no influence, which encourages the use of dynamic assessment in the context of speech and language assessment with bilingual children. This study adds to evidence that dynamic assessment is a promising task for identifying bilingual and monolingual children with developmental language disorder, particularly when the situation involves interaction with graduated cues.