This paper discusses the interpretation of data on two types of phonological change: change in language over time in the culture, and change in the development of the individual speaker; and examines the position that these two sorts of change interact in a certain way in relation to phonological structure. If one conceives of phonology as a…

The techniques of transformational grammar can be used effectively to identify and describe significant differences in the language competencies of children at several grade levels. The oral language responses of 150 elementary school children and 30 kindergartners (selected at random) to two silent, animated films of Aesop's "Fables" were…