Evidence is presented from an experimental study with 21 children ages 4 to 5 years suggesting the coincident emergence of certain Determiner Phrases (DPs) as barriers to wh-movement and as separate binding domains. It is argued that the default assumption for children's grammar may be to assume NP is the maximal projection for a structure until a…

A novel approach is examined for using developmental sequence data for deciding between Universal Grammar-based and problem solving models of adult nonnative grammatical development. Results support the Universal Grammar-based model of nonnative language acquisition. (19 references) (Author/LB)

Challenges the idea that grammatical representations in second-language development are parametric values that are transferred from the learner's native language, offering learner data incompatible with this view. Advocates a weak transfer model in which lexical and functional projections transfer, but morphology-driven values of features like the…