A study made to examine the development in production of the English verbal auxiliary and copula (VAC) "to be" compared a group of children with language dysfunction and a group of normal children. Two purposes were to see whether developmental differences are qualitative or quantitative and to calculate the importance of the VAC in language…

Research was conducted to study systematically the comprehension and production of the pronouns "he, she, him, her" in the language of normal and linguistically deviant children. The purposes of the study were to: observe the manner in which normal children comprehend and produce these four pronouns, in terms of both their use and their…