The earlier that Deaf children have the chance to naturally acquire sign language with constant language input, the better their cognitive and social skills, because they are able to receive information about actions, objects, experiences, and events in time.
Early exposure to sign language has a positive impact on the cognitive and social development of Deaf children. The more consistent and early the linguistic input, the better they can understand and process information about actions, objects, experiences, and events in a timely manner.