Case studies are presented of four children, age four to six, with severe phonological disorders, demonstrating three generations of family members with speech/language problems. An autosomal dominant mode, a multifactorial-polygenic model, and a sex-specific threshold model for expression are discussed. (Author/JDD)

This tutorial in nonlinear phonology introduces the basic concepts and assumptions of this new theoretical approach and then demonstrates clinical applications of the theory for assessment and intervention. Data from a child with a severe phonological disorder are used to illustrate aspects of nonlinear theory. (Author/DB)

This article describes an approach to the treatment of young children whose speech problems are classified in the category of "persistent sound system disorder." The approach fosters development of stimulability skills through broadening of the phonetic inventory early in the treatment process. A case study illustrates treatment…