Sibwatch: Optimizing Intervention Options for Infants and Toddler Siblings of Autistic Children

This rigorous randomized controlled trial will evaluate the efficacy and acceptability of a preemptive, telehealth intervention (tele-ImPACT) in a large, representative sample of infant siblings of autistic children, who are known to be at high likelihood of receiving a future diagnosis of autism and/or developmental language disorder (HL-Sibs). If our hypotheses are supported, this innovative and interdisciplinary study will provide empirical support for a novel approach to treatment that is theoretically motivated and developmentally informed, as well as accessible for and acceptable to families, and will lend new insights into the developmental windows in which, mechanisms by which, and subgroups for which the treatment works. Such findings would have strong implications for research, policy, theory, and practice in young children at risk for autism and/or language disorder.

NCT Number	NCT07069413
Lead Sponsor	University of Texas at Austin
Conditions	Autism Sibling
Enrollment	140 participants
Start Date	2026-04-01
Primary Completion	2031-03-31 (estimated)
Study Completion	2032-03-31 (estimated)
Updated on ClinicalTrials.gov	2026-06-12