Explaining the acquisition and processing of relative clauses has long challenged psycholinguistics researchers. The current volume presents a collection of chapters that consider the acquisition of relative clauses with a particular focus on function, typology, and language processing. A diverse range of theoretical approaches and languages are bought to bear on the acquisition of this construction type, making the volume unique in its coverage. The volume will appeal to students and scholars whose interest lies in the acquisition and processing of syntax with a particular focus on complex sentences in crosslinguistic and functionalist perspective.