This article offers the author's commentary on the Multiple Grammars (MG) language acquisition theory proposed by Luiz Amaral and Tom Roeper in the present issue. Multiple Grammars advances the claim that optionality is a constitutive characteristic of any one grammar, with interlanguage grammars being perhaps the clearest examples of a…

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 article clarifies some ideas presented in this issue's keynote article (Amaral and Roeper, this issue) and discusses several issues raised by the contributors' comments on the nature of the Multiple Grammars (MG) theory. One of the key goals of the article is to unequivocally state that MG is not a parametric theory and that its…

This article offers the author's commentary on the Multiple Grammar (MG) language acquisition theory proposed by Luiz Amaral and Tom Roeper in the present issue and touches on other second language acquisition research. Topics discussed include the concept of second language (L2) optionality, a hypothesis regarding the acquisition of the…

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…

This article examines the Multiple Grammars (MG) theory proposed by Luiz Amaral and Tom Roeper in the present issue and presents a critique of the research that went into the theory. Topics discussed include the allegation that the bilinguals and second language learners in the original article are primarily students in an academic setting, Amaral…

The present paper generally reviews the history of second language (L2) researchers' efforts in an attempt to find such an index and the possible reasons for the difficulties in establishing the developmental index from both the theoretical and the empirical viewpoints. Two contradictory views--interlanguage theory and emergentism--can finally be…

This paper presents a brief summary of processability theory as proposed by [Pienemann, M., 1998a. "Language Processing and Second Language Development: Processability Theory." John Benjamins, Amsterdam; Pienemann, M., 1998b. "Developmental dynamics in L1 and L2 acquisition: processability theory and generative entrenchment." "Bilingualism:…

This article surveys the development of second language (L2) phonology over the last 40-50 years. Research in this area has grown from analyzing learners' errors in terms of Contrastive Analysis to proposals explaining L2 sound patterns in terms of constraints on interlanguage grammar. Although native language transfer has endured as one source of…

The distinction in meanings of the English word "educated" and Spanish "educado" is used to illustrate a theory of semantic memory for the bilingual that proposes two lexical stores, one for each language, in close cooperation with and connected by one semantic memory. The postulated relation between the lexicons and the semantic memory is…

Re-examines research literature supporting the idea that infants and young children simultaneously learning two languages mix elements from the two languages. It is argued that, contrary to most extant interpretations, bilingual children develop differentiated language systems from the beginning and are able to use their developing languages in…

Research on the role of the first language (L1) in second language (L2) learning is reviewed, offering historical background but focusing primarily on work within the last two decades. Attention is given mainly to two aspects of the L1-L2 relationship: positive transfer of knowledge from L1 in the process of learning L2, and negative transfer, or…

A comparison of three models of language learning: the Creative Construction Hypothesis, the Interlanguage Hypothesis and The Approximate Systems Model. Evidence is provided to support the hypothesis that the third model which incorporates both functional and linguistic analysis describes second language learning and explains why learners progress…

Presents a detailed study of the second-language (L2) acquisition of English aspect by native speakers of Slavic languages. Results bring new evidence to bear on the theoretical choice between direct access to the L2 value or starting out the process of acquisition with the first-language value of a parameter, supporting the latter view.…

This article presents a selective review of the work carried out recently in second language acquisition (SLA) research which makes use of oral learner corpora and computer technologies. In the first part, the reasons why the field of SLA needs corpora for addressing current theoretical issues are briefly reviewed. In the second part, recent…