Using an oral sentence production task, we investigated how preschoolers (N = 28) produce agreement with complex noun phrases and compared their performance to college students (N = 32) to determine whether preschoolers produce agreement patterns that are qualitatively similar to adults'. We also conducted corpus analyses to investigate relevant…

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…

We present an artificial language experiment investigating (i) how speakers of languages such as English with two-way obligatory distinctions between singular and plural learn a system where singular and plural are only optionally marked, and (ii) how learners extend their knowledge of the plural morpheme when under the scope of negation without…

The phenomenon of regularization -- learners imposing systematicity on inconsistent variation in language input -- is complex. Studies show that children are more likely to regularize than adults, but adults will also regularize under certain circumstances. Exactly why we see the pattern of behaviour that we do is not well understood, however.…

Learning new words involves decoding both how a word fits the current situation and how it could be used in new situations. Three studies explore how two types of cues--sentence structure and the availability of multiple instances--affect children's extensions of nouns and verbs. In each study, 2.5-year-olds heard nouns, verbs, or no new word…

We investigated the production of subject relative clauses (SRc) in Italian pre-school children with Specific Language Impairment (SLI) and age-matched typically-developing children (TD) controls. In a structural priming paradigm, children described pictures after hearing the experimenter produce a bare noun or an SRc description, as part of a…