Mastery of grammatical gender is difficult to achieve in a second language (L2). This study investigates whether persistent difficulty with grammatical gender often observed in the speech of otherwise highly proficient L2 learners is best characterized as a production-specific performance problem, or as difficulty with the retrieval of gender information in real-time language use. In an experimental design that crossed production/comprehension and online/offline tasks, highly proficient L2 learners of Spanish performed at ceiling in offline comprehension, showed errors in elicited production, and exhibited weaker use of gender cues in online processing of familiar (though not novel) nouns than native speakers. These findings suggest that persistent difficulty with grammatical gender may not be limited to the realm of language production, but could affect both expressive and receptive use of language in real time. We propose that the observed differences in performance between native and non-native speakers lie at the level of lexical representation of grammatical gender and arise from fundamental differences in how infants and adults approach word learning.

In research on language development by bilingual children, the early language environment is commonly characterized in terms of the relative amount of exposure a child gets to each language based on parent report. Little is known about how absolute measures of child-directed speech in two languages relate to language growth. In this study of 3-year-old Spanish-English bilinguals (n = 18), traditional parent-report estimates of exposure were compared to measures of the number of Spanish and English words children heard during naturalistic audio recordings. While the two estimates were moderately correlated, observed numbers of child-directed words were more consistently predictive of children's processing speed and standardized test performance, even when controlling for reported proportion of exposure. These findings highlight the importance of caregiver engagement in bilingual children's language outcomes in both of the languages they are learning.

Research with monolingual children has shown that early efficiency in real-time word recognition predicts later language and cognitive outcomes. In parallel research with young bilingual children, processing ability and vocabulary size are closely related within each language, although not across the two languages. For children in dual-language environments, one source of variation in patterns of language learning is differences in the degree to which they are exposed to each of their languages. In a longitudinal study of Spanish/English bilingual children observed at 30 and 36 months, we asked whether the relative amount of exposure to Spanish vs. English in daily interactions predicts children's relative efficiency in real-time language processing in each language. Moreover, to what extent does early exposure and speed of lexical comprehension predict later expressive and receptive vocabulary outcomes in Spanish vs. English? Results suggest that processing skill and language experience each promote vocabulary development, but also that experience with a particular language provides opportunities for practice in real-time comprehension in that language, sharpening processing skills that are critical for learning.

The objective of this research was to compare child second language (L2) learners and children with specific language impairment (SLI) on both production and comprehension in order to investigate whether the similarity of their error profiles observed in spontaneous production extends to comprehension. Results are presented from an elicited production and a sentence-picture matching task targeting accusative object clitics in French. As groups, both L2 learners and children with SLI show a low rate of clitic suppliance in production, yet perform well on the comprehension task. No statistically significant differences are found between the two groups on either task. Analyses of individual results, however, reveal diversity within both groups. Although there seems to be a correlation between performance in production and comprehension in the L2 group, this is not the case in the SLI group.Until recently, there has been little contact between research on second language acquisition (SLA) and research on specific language impairment (SLI), although one of the central issues in both fields (the source of developmental errors made by the respective learners) is strikingly similar. Despite somewhat different terminologies, both fields engage in an ongoing debate between those locating the learners' deficit in grammatical representations and those seeking an account outside the grammar proper, that is, in performance or processing limitations.In the past few years, a small number of studies has drawn attention to the surprising similarities in the spontaneous speech of children with SLI and child L2 learners. The first to point out the parallels between the two learner groups were Håkansson and Nettelbladt (1993, 1996;Håkansson, 2001) in studies on the acquisition of word order in Swedish. They found that both Swedish children with SLI and child L2 learners of Swedish produced ungrammatical verb-third utterances (instead of grammatical verb-second), an error never seen in the first language (L1) acquisition of Swedish by normally developing children according to these authors. They observed that "[t]he SLI children behave as if Swedish were not their first, but rather their second, language" (Håkansson & Nettelbladt,

This article explores the widely documented difficulty with object clitics in the acquisition of French. The study investigates the effects of L1 transfer and processing limitations on the production and comprehension of object clitics in child L2 learners of French with different L1 backgrounds (Chinese, Spanish). The Spanish-speaking learners performed better than Chinese-speaking learners on clitic-related tasks, indicating a facilitative effect of transfer when the L1 also has object clitics. Yet no evidence was found for (negative) transfer of null objects from Chinese to French, as learners consistently rejected interpretations requiring referential null objects on a receptive task. The frequency of Chinese-speaking learners’ object omissions in production was negatively correlated with an independent measure of working memory (backward digit span), consistent with the hypothesis that object clitic omission is affected by processing limitations. These findings are discussed within a psycholinguistic model of syntactic encoding during language production.