This paper focuses on the linguistic competence of adult Portuguese–German bilinguals in their heritage language, European Portuguese (EP), which they acquired at home in early childhood in the context of German as the majority language. Based on a grammaticality judgment test, we investigate their morphosyntactic knowledge of clitics. The central questions are whether possible deviations from native monolinguals may be traced back to a) lack of contact with the formal register; b) reduced input after preschool age; and c) cross-linguistic influence. The results reveal qualitative differences between the heritage speakers and a group of monolingual controls in almost all test conditions. We conclude that although the linguistic knowledge of the heritage bilinguals investigated in this study differs from that of monolinguals, it is not “deficient” but “different” and “innovative”, because it is primarily based on the spoken variety of the language and because it promotes linguistic changes which are inherent in the speech of native monolinguals.

In this study we explored whether native Spanish speakers’ knowledge of grammatical gender in their native language (L1) affects speech production in a second language (L2) which lacks this feature (English). We selected Spanish–English bilinguals for testing who were immersed in either an L1 or an L2 context. Using a picture–word task, participants had to name pictures in their L2 while ignoring distractor words that could be either gender-congruent or gender-incongruent according to the Spanish translation. Results revealed that non-immersed participants were slower naming the pictures in the congruent condition, suggesting that bilingual people are influenced by knowledge about gender in their native language, even when producing utterances in a language in which this information does not apply. However, no such influence was observed for immersed bilinguals, suggesting that immersion environment attenuates access to the native language. We interpret our results as evidence of transfer effects between languages with different lexical systems, which seem to depend on language immersion.

In the visual domain, more than two decades of work has argued for the existence of dual category learning systems. The reflective system uses working memory in an explicit fashion to develop and test rules for classifying. The reflexive system operates by implicitly associating perception with actions that lead to reinforcement. Dual-system models posit that in learning natural categories, learners initially use the reflective system and with practice, transfer control to the reflexive system. The role of reflective and reflexive systems in second language (L2) speech learning has not been systematically examined. In the study reported in this paper, monolingual native speakers of American English were trained to categorize Mandarin tones produced by multiple speakers. Our computational modeling approach demonstrates that learners use reflective and reflexive strategies during tone category learning. Successful learners use speaker-dependent, reflective analysis early in training and reflexive strategies by the end of training. Our results demonstrate that dual-learning systems are operative in L2 speech learning. Critically, learner strategies directly relate to individual differences in successful category learning.

This paper presents an investigation of lexical first language (L1) attrition, asking how a decrease in lexical accessibility manifests itself in long-term residents in a second language (L2) environment. We question the measures typically used in attrition studies (formal tasks and type–token ratios) and argue for an in-depth analysis of free spoken data, including factors such as lexical frequency and distributional measures. The study is based on controlled, elicited and free data from two populations of attriters of L1 German (L2 Dutch and English) and a control population (n = 53 in each group). Group comparisons and a Discriminant Analysis show that lexical diversity, sophistication and the distribution of items across the text in free speech are better predictors of group membership than formal tasks or elicited narratives. Extralinguistic factors, such as frequency of exposure and use or length of residence, have no predictive power for our results.

In a multiple-session training study, native English speakers learned foreign Dutch vocabulary items that mapped to English either in a one-to-one way (translation-unambiguous) or in a one-to-many way (translation-ambiguous), such that two Dutch words corresponded to a single English translation. Critically, these two translation-ambiguous Dutch words were taught on consecutive trials in the same session, or were presented separately, such that each word was taught in a separate session. Translation-ambiguous words were produced and recognized substantially less accurately than translation-unambiguous words on tests administered one and three weeks after training. An ambiguity advantage emerged, however, in a free-recall test. Interestingly, teaching both translations together led to superior performance over teaching them in separate sessions, in which case the translation learned first enjoyed a considerable advantage over that learned second. These findings underscore the importance of order of acquisition in second-language vocabulary learning, and have practical implications for language instruction.

This study used lexical tasks to examine associations between languages, tasks, and age in bilingual children with primary language impairment. Participants (n = 41, mean age 8;8 years) lived in the United States, spoke primarily Spanish (L1) at home and English (L2) at school, and were identified with moderate to severe impairments in both languages. A total of eight tasks (four in each language) measured breadth of vocabulary knowledge (receptive and expressive vocabulary) and aspects of lexical processing (rapid automatic naming and nonword repetition). Correlational analyses revealed older children outperformed younger children on lexical tasks in L2 but not L1, as well as relative L2 dominance for most individuals and tasks. Positive associations were found between languages on processing-based tasks but not vocabulary measures. Findings were consistent with literature on typical bilingual learners, albeit with a notable increased risk of plateau in L1 growth. Results are interpreted within a Dynamic Systems framework.

Monolingual speakers show priming for idiomatic sequences (e.g. a pain in the neck) relative to matched controls (e.g. a pain in the foot); single word translation equivalents show cross-language activation (e.g. dog–chien) for bilinguals. If the lexicon is heteromorphic (Wray, 2002), larger units may show cross-language priming in the same way as single words. We used the initial words of English idioms (e.g. to spill the. . . beans) and transliterated Chinese idioms (e.g. draw a snake and add. . . feet) as primes for the final words in a lexical decision task with high proficiency Chinese–English bilinguals and English monolinguals. Bilinguals responded to targets significantly faster when they completed a Chinese idiom (e.g. feet) than when they were presented with a matched control word (e.g. hair). The results are discussed in terms of conceptual activation and lexical translation processes, and are also incorporated into a dual route model of formulaic and novel language processing.

To address the negative effects of deafness on spoken language acquisition, many clinicians suggest using cochlear implant (CI) and oral education and advise against sign language, even when combined with spoken language (i.e., bilingualism), believing that it may slow down spoken language development. In a deaf child with CI who was exposed at an early age to Italian Sign Language and spoken Italian, we evaluated language development and the relationship between the two languages. The number of words/signs produced by the child consistently increased with age, and the vocabulary growth rate in spoken Italian was equivalent to that of hearing peers. Before CI, the child relied almost exclusively on sign language; after CI, he gradually shifted to spoken Italian yet still used sign language when unable to retrieve words in spoken Italian. We conclude that bimodal bilingualism may scaffold the development of spoken language also in deaf children with CI.

The purpose of this study was to investigate receptive vocabulary achievement among French–English bilinguals in Canada. Standardized test scores of receptive vocabulary were measured in both languages from preschool, early-elementary, and late-elementary French–English bilingual children, and French–English bilingual adults. Mean vocabulary scores across all bilingual age groups were statistically equivalent to or above the standard mean in French and English with the exception of the early-elementary bilinguals who scored below the standard mean on the English vocabulary assessment. Mean vocabulary scores of the preschool and adult bilingual groups were not significantly different from those of their monolingual peers in either language. However, early-elementary and late-elementary bilingual children scored significantly lower than monolinguals on the English vocabulary assessment. The positive sociocultural context for French–English bilingualism in Canada as well as language input changes in school are discussed as underlying reasons for these findings.

This study investigated the occurrence of interactive alignment between bilingual interlocutors communicating in a shared second language (L2). Thirty university-level students from various language backgrounds completed two information-exchange tasks in L2 English. Excerpts from the beginning and end of the interactions were presented to ten native-speaking listeners who rated each interlocutor individually and both interlocutors as a team for speech and personality variables, including degree of alignment. Results revealed interactive alignment which encompassed different aspects of interlocutors’ speech and personality characteristics in each task. Theoretical and practical implications for alignment as a sociocognitive phenomenon in lingua franca contexts are discussed.