Project VOICES: Vocal Optimization in Children Elevating the Spectrum

Thirty percent of children with autism barely talk or do not talk at all despite years of intervention. This study aims to address this important and long-standing challenge by developing a novel intervention to increase the quantity and quality of vocalizations (i.e., sounds children make before words) and expressive language in young children with autism (aged 2 to 5 years) with minimal verbal skills. The intervention includes contingent responses to the child's vocalizations and vocal elicitation strategies. We also collect social validity information from parents about how they perceive the novel intervention.

NCT Number	NCT06875843
Lead Sponsor	Vanderbilt University Medical Center
Conditions	Autism
Enrollment	3 participants
Start Date	2025-04-25
Primary Completion	2026-07-24 (estimated)
Study Completion	2026-07-24 (estimated)
Updated on ClinicalTrials.gov	2026-07-30