Contributing to the early detection of Rett syndrome: The potential role of auditory Gestalt perception

► First study into the potential role of auditory Gestalt perception for an early detection of RTT. ► The study adds to our understanding of pre-regressional abnormalities in RTT. ► Verbal development in RTT is atypical from the first vocalizations onwards. ► Early atypical verbal behavior is a window to the developing nervous system. ► The study contributes to the early detection of RTT for early intervention.