Learning inflectional morphology is a vexing problem for second language (L2) learners. Children acquiring their native language also experience some difficulty, which results in their committing overgeneralization errors. Long after individuals have achieved a high level of proficiency in the L2, they are still plagued by uncertainty when it…

Examines the CDI-WORDS Short Form vocabulary checklist as an index of language production. The study focuses on the associations between this short form and directly observed measures of lexical production; the associations between short-form checklists administered at different ages; the predictive associations between short form scores and…

Examined the strength of the association between language exposure estimates and vocabulary learning for simultaneous bilingual infants with differing patterns of exposure to the languages being learned. Findings revealed that the correlation was strong, even for children whose language environments changed by more than 20% between observations.…