Proposes that phonological development involves the three fundamental processes of perception, organization and production. Acquisition proceeds by the suppression of natural phonological processes in a systematic fashion. Processes slide through a child's system, appearing first as constraints on perception, and later on organization and…

Analysis of the questions asked by normal children suggests that there are cognitive stages of question development. Samples of spontaneous questions asked by normal children and linguistically deviant children were compared in this study in order to determine if linguistically deviant (aphasic) children suffer primarily from a syntactic…

Language samples of 15 young normal children actively engaged in learning base syntax were compared with samples of 15 linguistically deviant children of a comparable linguistic level. Mean number of morphemes per utterance was used to determine linguistic level. The two groups were matched according to five linguistic levels previously…