Despite longstanding assertions that first language (L1) and second language (L2) acquisition rely on fundamentally different processes, recent research increasingly questions this dichotomy by exploring the cognitive mechanisms underlying them. The present study investigates the contribution of two explicit learning abilities, language analytic ability and non-verbal abstract reasoning, traditionally deemed irrelevant for L1 acquisition, in accounting for individual differences in grammatical comprehension in both L1 and L2 contexts. Adult native speakers of English were tested on their ability to comprehend various syntactic structures in their L1 as well as in a newly acquired artificial language. Our findings revealed that language analytic ability and non-verbal reasoning contribute to variance in grammatical comprehension in both languages. Additionally, considerable interindividual variation was observed in the L1 task, challenging the prevailing view of uniformity in native grammar acquisition. These results underscore the role of explicit learning mechanisms in both native and non-native language acquisition and suggest that the cognitive factors influencing them are more similar than previously recognized.

This paper examined the relationship between working memory (WM) and L2 linguistic knowledge as well as L2 listening comprehension with 150 Japanese EFL learners. The study also investigated the extent to which these relationships vary across L2 proficiency levels. The results in the study were as follows: (a) WM capacity was more strongly associated with L2 listening comprehension, L2 perceptual processing, and L2 syntactic parsing processing in the lower-proficiency group than in the higher-proficiency group; (b) L1 WM capacity still accounted for the unique variance in L2 listening comprehension after adjusting for the L2 language-related variables in the lower-proficiency group. The results suggest that the relationship between WM capacity and L2 listening comprehension may be mediated by L2 proficiency and depend on the domain-general processing efficiency reflecting central executive attention when the listening comprehension task requires conscious attention for less proficient listeners. The findings provide suggestive evidence for variation in the role of WM in L2 listening comprehension across proficiency levels and the significant role of L1 WM capacity in L2 listening comprehension as the general cognitive factor independent of L2 linguistic knowledge for L2 learners with limited linguistic knowledge.

Perceptual learning of novel accents is a critical skill for second-language speech perception, but little is known about the mechanisms that facilitate perceptual learning in communicative contexts. To study perceptual learning in an interactive dialogue setting while maintaining experimental control of the phonetic input, we employed an innovative experimental method incorporating prerecorded speech into a naturalistic conversation. Using both computer-based and face-to-face dialogue settings, we investigated the effect of two types of learning mechanisms in interaction: explicit corrective feedback and implicit lexical guidance. Dutch participants played an information-gap game featuring minimal pairs with an accented English speaker whose /ε/ pronunciations were shifted to /ɪ/. Evidence for the vowel shift came either from corrective feedback about participants’ perceptual mistakes or from onscreen lexical information that constrained their interpretation of the interlocutor’s words. Corrective feedback explicitly contrasting the minimal pairs was more effective than generic feedback. Additionally, both receiving lexical guidance and exhibiting more uptake for the vowel shift improved listeners’ subsequent online processing of accented words. Comparable learning effects were found in both the computer-based and face-to-face interactions, showing that our results can be generalized to a more naturalistic learning context than traditional computer-based perception training programs.

This commentary on Mayberry and Kluender (2017) considers the geometry of the function relating Age of Acquisition (AoA) to L2 attainment, the effects of multilingual exposure on one's native language(s) and, briefly, the role of education in language learning.

This study examined the role of sex and intelligence in the relationship between field dependence-independence and second language acquisition for a sample of 383 students (187 girls and 196 boys) aged between 13 and 16. The Portable Rod and Frame Test (PRFT) and the Embedded Figures Test (EFT) were used to evaluate cognitive style. A two-way covariance analysis, with intelligence as the covariate, was employed to investigate differences in second language achievement between students classified as either field-dependent or field-independent. A cluster analysis using z scores was examined to study the performance of subjects classified as either field-dependent or field-independent according to scores obtained on the EFT and the PRFT (“coincident” subjects) and those classified as field-dependent in one test and field-independent in the other (“non-coincident” subjects). No statistically significant differences between the two groups were obtained when cognitive style was defined by scores on the PRFT. When field dependence-independence was measured by scores on the EFT, field-independent girls performed better than field-dependent girls (p < .005), but this outcome was not observed for boys. These results suggest a differential contribution of the “perceptive” and “cognitive” components of field dependence-independence and a modulating role by sex.