Purpose: Vocabulary is a domain of particular challenge for many children with autism spectrum disorder (ASD). Recent research has drawn attention to ways in which lexical characteristics relate to vocabulary acquisition. The current study tested the hypothesis that lexical characteristics account for variability in vocabulary size of young…

Purpose: The authors examined longitudinal associations between 2 categories of parent verbal responsiveness and language comprehension and production 1 year later in 40 toddlers and preschoolers with a diagnosis of an autism spectrum disorder (ASD). Method: Parent-child play samples using a standard toy set were digitally captured and coded for…

This longitudinal investigation charted the course of cognitive and language development from the prelinguistic period to multiword productions in 19 typically developing toddlers and 4 toddlers who were subsequently identified as having a late onset of expressive language. Three different developmental profiles were identified, and predictors of…

The effectiveness of two language treatment methods, modeling versus modeling plus evoked production, in promoting productive vocabulary in three late-talking toddlers was compared. Two subjects differed as to which particular treatment method was associated with better performance. Neither treatment method was effective for the third subject.…