This special issue revisits a classic topic in linguistic theory, A-bar movement, applied to developing and bilingual grammars. We claim that A-bar movement, or filler-gap dependencies, is still the quintessential linguistic phenomenon to illustrate the interaction between the biological endowment, the experience with language (past and present),…

Westergaard's microcue account raises the question of the exact nature of language transfer in the acquisition of languages as well of how L1/Ln input interacts with the principles of universal grammar (UG) during processing. In order to consider in more detail the actual representation building, processing mechanisms that would be involved, her…

In this commentary, I suggest that it may be helpful to think about the formidable problem space that Westergaard's (2021) Linguistic Proximity Model seeks to address at the three levels of analysis that Marr (1982) famously proposed are needed to understand any complex cognitive system. I argue that at the computational level of analysis, where…

In this article, I argue that first language (L1), second language (L2) and third language (L3) acquisition are fundamentally the same process, based on learning by parsing. Both child and adult learners are sensitive to fine linguistic distinctions, and language development takes place in small steps. While the bulk of the article focuses on…

Amaral and Roeper (this issue; henceforth A&R) argue that all speakers -- regardless of whether monolingual or bilingual -- have multiple grammars in their mental language representations. They further claim that this simple assumption can explain many things: optionality in second language (L2) language behaviour, multilingualism, language…

Optionality is a central phenomenon in second language acquisition (SLA), for which any adequate theory must account. Amaral and Roeper (this issue; henceforth A&R) offer an appealing approach to it, using Roeper's Multiple Grammars Theory, which was created with first language in mind but which extends very naturally to SLA. They include…

This paper presents an extension of the Multiple Grammars Theory (Roeper, 1999) to provide a formal mechanism that can serve as a generative-based alternative to current descriptive models of interlanguage. The theory extends historical work by Kroch and Taylor (1997), and has been taken into a computational direction by Yang (2003). The proposal…

The article by Amaral and Roeper (this issue; henceforth A&R) presents many interesting ideas about first and second language acquisition as well as some experimental data convincingly illustrating the difference between production and comprehension. The article extends the concept of Universal Bilingualism proposed in Roeper (1999) to second…

Raises a series of problems that attach to the standard analysis of input to learning as the stimulus array minus unattended-to information, where attention is construed as a selection function. Demonstrates the inadequacy of this distinction as the foundation for a theory of input in second-language acquisition. (Author/VWL)

We discuss the results of an experiment that investigates English-French learners' interpretation of quantifiers with detachable restrictions. Such quantifiers are ungrammatical in English. We investigate aspects of interpretation that rely on a highly idiosyncratic interface between grammar and general principles of conversational cooperation in…

Suggests that differences between first- and second-language learners are due to principles of universal grammar (UG) that guide first language (L1), but not second language (L2) acquisition. This view can be reconciled with the idea that L2 learners can use UG principles to some extent in evaluating target sentences. (49 references) (Author/VWL)

Explores Ritchie's research supporting the hypothesis that universal grammar principles are available to adult second language learners. It is concluded that the experimental principle is not an innate grammatical principle, that methodological problems are inherent in the experimental design, and that results are due to effects of processing…

Discusses the theoretical implications of an experimental pilot study on the acquisition of word order properties in the French spoken by Dutch native speakers. Results provide support for the universal grammar approach to second-language acquisition. (Author/CB)

Replication of research on the relationship between universal grammar (UG) and second language learning studied Arabic-speaking learners of English. The present study's findings contradicted the previously supported theory regarding the importance of universal grammar to second language learning. (38 references) (CB)