The Childhood Development after Cochlear Implantation (CDaCI) Study ​is a multicenter, longitudinal cohort study of young children with sensorineural hearing loss, who received a cochlear implant (CI) under the age of 5 years.  The study is supported by the National Institute on Deafness and Other Communication Disorders (NIDCD) of the National Institutes of Health (NIH) [Grant #R01DC004797].
The purpose of the CDaCI Study has been to identify factors that influence language learning across multiple domains, including oral language development, auditory performance, psychosocial functioning, and quality of life.
Between 2002-2004, the CDaCI Study enrolled 188 children with CIs and 97 normal hearing peers.  We are no longer recruiting children for the study.  Enrolled participants completed their baseline visit prior to receiving a cochlear implant (for CI participants) or at a comparable age for hearing peers.  Follow-up visits occurred every 6 months for the first 3 years, and annually thereafter.

Participating Research Centers:

Johns Hopkins University (JHU) - The Listening Center
University of Miami - Ear Institute
University of Michigan - Hearing Rehabilitation Center
University of North Carolina (UNC) - The Children's Cochlear Implant Center
University of Southern California (USC) - Caruso Family Center for Childhood Communication
University of Texas at Dallas (UTD) - Callier Advanced Hearing Research Center

Thank you to our wonderful participants and their families
for their dedication to this study for more than a decade!

Without you and your countless hours of completing testing and surveys,
the CDaCI Study would not be possible.