Children with delays in expressive language (late talkers) have heterogeneous developmental trajectories. Some are late bloomers who eventually "catch-up," but others have persisting delays or are later diagnosed with developmental language disorder (DLD). Early in development it is unclear which children will belong to which group. We…

There is a noted advantage of dense neighborhoods in language acquisition, but the learning mechanism that drives the effect is not well understood. Two hypotheses--long-term auditory word priming and phonological working memory--have been advanced in the literature as viable accounts. These were evaluated in two treatment studies enrolling twelve…

The effect of word-level variables on expressive phonology has not been widely studied, although the properties of words likely bear on the emergence of sound structure (Stoel-Gammon, 2011). Eight preschoolers, diagnosed with phonological delay, were assigned to treatment to experimentally induce gains in expressive phonology. Erred sounds were…

This dissertation will focus on the processing and learning of abstract, phrasal argument structure constructions. Chapter 1 provides the theoretical framework for abstract constructions, and illustrates the importance of such representations in speakers' linguistic knowledge. Chapter 2 reviews the evidence for meaning being associated with…

Effects of adult contingent vocal imitation on vocal imitation skills of three young (26 to 29 months) children with mental retardation were investigated. All children vocally imitated in response to adult contingent imitation during training. There was minimal generalization to adult contingent imitation and elicited imitation prompts but…

The effectiveness of training mothers to use four incidental language teaching procedures with their language-delayed preschoolers was evaluated. Six mothers were trained to use the following techniques: first, the Model Procedure, which provides the response for the child to imitate; second, the Mand-Model Procedure, which elicits information the…

Two three-year olds, one verbal and one nonverbal, with moderate to severe developmental delays were taught target communication objectives using milieu language teaching. The children generalized their target objectives spontaneously and in probe situations that also required them to display listener preparatory behaviors. (Author/DB)

The primary and generalized effects of Enhanced Milieu Training were examined with six preschool children with significant language delays. Children systematically increased their use of target language skills during the intervention sessions, and these changes were maintained when treatment was discontinued. Some generalization to untrained…

Delays in language acquisition can have serious deleterious effects on the education and social development of children. A number of related language intervention procedures have been developed for use in natural settings. These procedures include incidental teaching, modeling, manding, time-delay, and milieu language teaching. The present paper…