Age Constraint on Foreign Language Learning in Monolingual Versus Bilingual Learners

AbstractThis research aims at investigating the effect of age constrains and monoligualism/bilingualism on foreign language learning. In so doing, 50 Persian monolinguals and 25 Kurdish-Persian bilinguals were tested on a wide variety of structures of English grammar using a grammatically judgment task. The results demonstrated a strong advantage for learning in age up to puberty; moreover, at this stage there were no significant differences between monolingual and bilingual performances. But after puberty, the performance of both monolinguals and bilinguals was low but bilinguals’ performance was significantly higher than monolinguals