Purpose: This follow-up study examined whether a parent intervention that increased the diversity of lexical noun phrase subjects in parent input and accelerated children's sentence diversity (Hadley et al., 2017) had indirect benefits on tense/agreement (T/A) morphemes in parent input and children's spontaneous speech. Method: Differences in…

Purpose: The current study used an intervention design to test the hypothesis that parent input sentences with diverse lexical noun phrase (NP) subjects would accelerate growth in children's sentence diversity. Method: Child growth in third person sentence diversity was modeled from 21-30 months (n = 38) in conversational language samples obtained…

A study tested the hypothesis that if, for the 2-year-old, the transitive/intransitive distinction functions to signal differences in the conceptualization of actions, the child's sentence production should show a relationship between sentence frame and (1) locus of change animacy and (2) the child's expectations concerning an action's outcome.…