The below interactive graph shows receptive (comprehension) or expressive spoken language scores over 3 years of follow-up for children with normal hearing and children with CIs in the CDaCI study.  Checking or unchecking boxes on the right side will display or remove individual trajectories or mean trajectories of language growth over the period for whichever age group or hearing status group is marked or unmarked.  These interactive graphs have been published by JAMA and can also be seen here:, as part of the "Spoken language development in children following cochlear implantation" paper by Niparko et al. (2010)