INTRODUCTION: The development of deaf children follows the same steps and issues as hearing children, since their inherited communication skills are respected. Consider the necessity of the development of mourning of the expected child and the importance of the creation of bonds of affection. OBJECTIVE: To describe the evaluation of the development and of the cognition of twenty patients, with ages ranging from one and thirteen years, highlighting the important factors that contributed to their outcome. METHODS: Interviews with parents; the Vineland Social Maturity Scale; Columbia Maturity Scale; Free Drawings; Bender and Pre-Bender Testing; and Pedagogical Tests. Tests were selected according individual skills. RESULTS: Each patient was described. DISCUSSION/CONCLUSION: The acceptance of deafness proved to be the starting point for the development of communication, be it verbal or gestural, as well as cognitive, motor, and emotional development. If the association between deafness and fine motor skills, whether associated or not with multiple disabilities, undermines the development of speech, it does not greatly affect communication when there is interaction with peers and maternal stimulation. Overprotection and poor sociability not only made the children less independent but also impaired their development and caused low self-esteem. Further studies should be performed for observing how the CI contributed to the recovery of these patients. Heloisa Romeiro Nasralla Psychologist CRP 06/0562 Member of the Cochlear Implant Team HCFMUSP.