Purpose: To examine how interaction contributes to phonological acquisition in bilingual children in order to determine what constitutes typical development of bilingual speech sound inventories. Method: Twenty-four children, ages 3-4, were included: eight bilingual Spanish-English-speaking children, eight monolingual Spanish speakers, and eight…

The goal of this research programme was to evaluate the role of word lexicality in effecting phonological change in children's sound systems. Four children with functional speech sound disorders (SSDs) were enrolled in an across-subjects multiple baseline single-subject design; two were treated using high-frequency real words (RWs) and two were…

Drawing on archival data on the sound systems of five children ages 3 to 4 with normal development and 47 children ages 3 to 6 with phonological delay, one chain shift (interaction of phonological substitution errors) was identified in the speech of six children. Different derivational and constraint-based accounts of the chain shift were…