The present study explores knowledge of Spanish grammatical gender in both comprehension and production by heritage language speakers and second language (L2) learners, with native Spanish speakers as a baseline. Most L2 research has tended to interpret morphosyntactic variability in interlanguage production, such as errors in gender agreement, as…

A grammaticality judgment test based on five structures of English grammar was administered in oral and written form. Two groups were formed by separating participants who began learning English at younger and older than 15 years of age. Performance patterns were different for the two groups, the linguistic structure tested affected participants'…