Results from an English acceptability-rating experiment are presented that demonstrate that people find doubly nested relative-clause structures just as acceptable when only two verb phrases are included instead of the grammatically required three. Three possible accounts of the results are considered. (Author/VWL)

Native Spanish early and late acquirers of English and Vietnamese early and child acquirers of English made grammaticality judgments of sentences in their second language. Native acquirers of English were not distinguishable from native English speakers, whereas native Spanish late acquirers had difficulty with all aspects of the grammar tested…