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This paper investigates the role of amount of current and cumulative exposure in bilingual development and ultimate attainment by exploring the extent to which simultaneous bilingual children's knowledge of grammatical gender is affected by current and previous amount of exposure, including in the early years. Elicited production and grammaticality judgement data collected from 136 English–Dutch-speaking bilingual children aged between three and 17 years are used to examine the lexical and grammatical aspects of Dutch gender, viz. definite determiners and adjectival inflection. It is argued that the results are more consistent with a rule-based than a piecemeal approach to acquisition (Blom, Polišenskà & Weerman, 2008a; Gathercole & Thomas, 2005, 2009), and that non-target performance on the production task can be explained by the Missing Surface Inflection Hypothesis (Haznedar & Schwartz, 1997; Prévost & White, 2000; Weerman, Duijnmeijer & Orgassa, 2011).

Is parental language mixing related to vocabulary acquisition in bilingual infants and children? Bilingual parents (who spoke English and another language; n = 181) completed the Language Mixing Scale questionnaire, a new self-report measure that assesses how frequently parents use words from two different languages in the same sentence, such as borrowing words from another language or code switching between two languages in the same sentence. Concurrently, English vocabulary size was measured in the bilingual children of these parents. Most parents reported regular language mixing in interactions with their child. Increased rates of parental language mixing were associated with significantly smaller comprehension vocabularies in 1.5-year-old bilingual infants, and marginally smaller production vocabularies in 2-year-old bilingual children. Exposure to language mixing might obscure cues that facilitate young bilingual children's separation of their languages and could hinder the functioning of learning mechanisms that support the early growth of their vocabularies.

This study reconsiders the acquisition of relative clauses based on data from two sentence-repetition tasks. Using materials modeled on the relative constructions of spontaneous child speech, we asked four-year-old English- and German-speaking children to repeat six different types of relative clauses. Although English and German relative clauses are structurally very different, the results were similar across studies: intransitive subject relatives caused fewer errors than transitive subject relatives and direct object relatives, which in turn caused fewer errors than indirect object relatives and oblique relatives; finally, genitive relatives caused by far the most problems. Challenging previous analyses in which the acquisition of relative clauses has been explained by the varying distance between filler and gap, we propose a multifactorial analysis in which the acquisition process is determined primarily by the similarity between the various types of relative clauses and their relationship to simple sentences.

Children growing up bilingual face a unique linguistic environment. The current study investigated whether early bilingual experience influences the developmental trajectory of associative word learning, a foundational mechanism for lexical acquisition. Monolingual and bilingual infants (N = 98) were tested on their ability to learn dissimilar-sounding words (lif and neem) in the Switch task. Twelve-month-olds from both language backgrounds failed to detect a violation of a previously taught word–object pairing. However, both monolinguals and bilinguals succeeded at 14 months, and their performance did not differ. The results indicate that early bilingual experience does not interfere with the development of the fundamental ability to form word–object associations, suggesting that this mechanism is robust across different early language environments.

While continuing to uphold the major aims set out in the first generation of language socialization studies, recent research examines the particularities of language socialization processes as they unfold in institutional contexts and in a wide variety of linguistically and culturally heterogeneous settings characterized by bilingualism, multilingualism, code-switching, language shift, syncretism, and other phenomena associated with contact between languages and cultures. Meanwhile new areas of analytic focus such as morality, narrative, and ideologies of language have proven highly productive. In the two decades since its earliest formulation, the language socialization paradigm has proven coherent and flexible enough not merely to endure, but to adapt, to rise to these new theoretical and methodological challenges, and to grow. The sources and directions of that growth are the focus of this review.

Children (aged five-to-six and nine-to-ten years) and adults rated the acceptability of wellformed sentences and argument-structure overgeneralization errors involving the prepositionalobject and double-object dative constructions (e.g. Marge pulled the box to Homer/Marge pulled Homer the box). In support of the entrenchment hypothesis, a negative correlation was observed between verb frequency and the acceptability of errors, across all age groups. Adults additionally displayed sensitivity to narrow-range semantic constraints on the alternation, rejecting doubleobject dative uses of novel verbs consistent with prepositional-dative-only classes and vice versa. Adults also provided evidence for the psychological validity of a proposed morphophonological constraint prohibiting Latinate verbs from appearing in the double-object dative. These findings are interpreted in the light of a recent account of argument-structure acquisition, under which children retreat from error by incrementally learning the semantic, phonological, and pragmatic properties associated with particular verbs and particular construction slots.

The present study investigates the influence of word category on naming performance in two populations: bilingual and monolingual children. The question is whether and, if so, to what extent monolingual and bilingual children differ with respect to noun and verb naming and whether a noun bias exists in the lexical abilities of bilingual children. Picture naming of objects and actions by Russian–German bilingual children (aged 4–7 years) was compared to age-matched monolingual children. The results clearly demonstrate a naming deficit of bilingual children in comparison to monolingual children that increases with age. Noun learning is more fragile in bilingual contexts than is verb learning. In bilingual language acquisition, nouns do not predominate over verbs as much as is seen in monolingual German and Russian children. The results are discussed with respect to semantic-conceptual aspects and language-specific features of nouns and verbs, and the impact of input on the acquisition of these word categories.