Background: There is a critical need to understand better speech and language development in bilingual children learning two spoken languages who use cochlear implants (CIs) and hearing aids (HAs). The paucity of knowledge in this area poses a significant barrier to providing maximal communicative outcomes to a growing number of children who have…

The question of a sensitive period in language acquisition has been subject to extensive research and debate for more than half a century. While it has been well established that the ability to learn new languages declines in early years, the extent to which this outcome depends on biological maturation in contrast to previously acquired knowledge…

The effect of a formal, structured approach to language development on preschool children is the subject of this project study. From August 1965 to August 1966, 157 programs administered to 1,663 children explored mental ability, auditory and visual discrimination, language use, vocabulary, and motivation. Children attending day care centers,…