A recent study comparing clinician-delivered speech therapy to parent-mediated intervention using Project ImPACT with young children with developmental language disorder was published in the International Journal of Language and Communication Disorders by Margo Zwitserlood-Nijenhuis and colleagues.

Zwitserlood‐Nijenhuis, M. A., Wiefferink, C. H., & Gerrits, E. (2023). A randomized study of parent‐versus child‐directed intervention for Dutch toddlers with DLD. International Journal of Language & Communication Disorders.