The acquisition of relative clauses in Russian and Polish in monolingual and bilingual children

In this paper, we present the results on (re)production of relative clauses in a sentence repetition task by Russian and Polish monolingual and bilingual children (3;6–6;6 years). Russian and Polish both involve overt case marking in the relative clause formation, but the case marking in Polish is more regular and transparent. Our results suggest that, when case marking is the only disambiguating cue, its transparency and regularity contributes to a significantly better performance. This explains why the Polish children, both monolingual and bilingual, were more successful in reproduction of subject and object relatives
compared to their Russian peers.