(The reader is referred to the previous issue of Bilingualism for the full text of the article.)

This study investigates the acquisition of verb movement phenomena in the interlanguage of English native speakers learning French as a second language. Participants (n=83), who were enrolled in three different classes, were given a grammaticality judgment task and a production task. The French native speakers' results (n=85) go against certain theoretical predictions for negation and adverb placement in nonfinite contexts, as well as for quantification at a distance. The production task results, but not the grammaticality judgment results, support the hypothesis that the effects of parameter resetting successfully appear in the interlanguage of adult L2 learners.

Three groups of participants were given a grammaticality judgement test based on five structures of English grammar in both an oral and written form. The first group consisted of native speakers of Chinese, the second, native speakers of Spanish, and the third, native English speakers. The two learner groups were divided into those who had begun learning English at a younger (less than 15 years) or older (more than 15 years) age. Performance was measured for both accuracy of judgement and time taken to respond. The results showed that performance patterns were different for the two learner groups, that the linguistic structure tested in the item affected participants' ability to respond correctly, and that task modality produced reliable response differences for the two learner groups. Although there were proficiency differences in the grammaticality judgement task between the younger and older Spanish learners, there were no such differences for the Chinese group. Furthermore, age of learning influenced achieved proficiency through all ages tested rather than defining a point of critical period. The results are interpreted as failing to provide sufficient evidence to accept the hypothesis that there is a critical period for second language acquisition.

This paper examines the bilingual language development of young Korean–American children with respect to their acquisition of English grammatical morphemes and the different plural marking systems of Korean and English. We address two specific issues: (1) “do L1 and L2 learners acquire the grammatical features of a given language in the same sequence?” and (2) “do L2 learners of different L1 backgrounds learn the grammatical features of a given second language in the same sequence?” Comparison of our results with those of other morpheme acquisition studies suggests that L1 and L2 learners of English do not acquire English grammatical features in the same sequence. Furthermore, there is evidence that first language influences the course of second language acquisition. Results of an experimental study of plural marking suggest that the bilingual children in most, but not all, respects follow similar, but delayed patterns of first language acquisition of Korean and successive acquisition of English.