Virtual Reality-Supported Speech Therapy in Children with Developmental Language Disorder: A Randomized Controlled Trial

Background/Objectives: Digital technologies are increasingly explored as complementary tools in speech and language therapy for children with neurodevelopmental disorders. However, evidence on virtual reality-based interventions for children with developmental language disorder (DLD) remains limited. This study aimed to evaluate the effects of a Virtual Reality Rehabilitation System (VRRS)-based language intervention combined with standard speech therapy in preschool children with DLD. Secondary objectives included assessing the feasibility, usability, and safety of the VRRS-integrated intervention. Methods: A randomized controlled pilot study was conducted in preschool children diagnosed with DLD. Participants were allocated to an experimental group receiving VRRS-based language intervention integrated with conventional therapy or to a control group receiving standard speech therapy alone. Both groups attended two 60 min sessions per week for six months. Clinical language outcomes were assessed at baseline (T0) and post-intervention (T1). Feasibility was evaluated through adherence and retention rates, usability through a therapist-completed questionnaire, and safety through monitoring of adverse events during sessions. Results: All participants in the experimental group completed the intervention (100% retention). No adverse events were observed. Therapists reported good usability of the VRRS system, highlighting ease of exercise customization, intuitive monitoring of progress, and good integration into routine therapy. Conclusions: VRRS-based activities integrated into conventional speech therapy appear feasible, safe, and well accepted in preschool children with DLD. Further controlled studies with larger samples are needed to confirm these findings. Trial Registration: ClinicalTrials.gov (NCT07438639).