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…

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 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 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…

Lardiere (2003), in her reply to Lakshmanan and Selinker (2001), justifies the use of suppliance in obligatory contexts as a method of analysis in the investigation of the second language (L2) acquisition of past tense, and claims that such a method is characteristic of previous studies that have proposed the Aspect Hypothesis. It is argued here…

Discusses the "null prep phenomenon" reported in studies of the second language (L2) development of extraction constructions. Reviews a proposal that null prep grammars represent a generalized procedure in L2 development, that of early reliance on A-bar binding construals when the target grammar requires wh-movement. Offers an…

Argues that the null preposition phenomenon is a special case of reliance on the A-bar binding strategy, examining research on English-French interlanguage in college classrooms and suggesting that apparent categorical mismatches in A-bar chains may result from preposition incorporation. Second-language learners can appeal to the A-bar binding…

Argues from the premise that a language test is a special case of a second language acquisition (SLA) elicitation device and suggests that SLA and language testing share much common ground in terms of research methods, which have similar properties in that they are both used to make systematic observations of language performances from which…

Addresses the issue of how we know what learners know based on evidence from second language (L2) learners' spontaneous speech samples gathered longitudinally. Examines some of the problems involved in the analysis of spontaneous speech, with focus on second language studies within the generative framework. Considers the effects of the comparative…

Discusses the scarcity of research on the characterization of the second-language (L2) initial state, where "L2 initial state" refers to the starting point of nonnative grammatical knowledge. The article emphasizes that exploring the mechanisms of "development" of interlanguage requires an understanding of what a particular stage changed "from."…

Expands on a view of "Valueless Features"--which suggests that the second-language (L2) initial state is distinct from natural language grammars because transfer obliterates the values associated with features located under functional heads--by examining data on the L2 acquisition of English by speakers of German. Despite important differences…

Critiques Pienemann and Johnston (1987), an influential model of the acquisition of English as a second language (ESL) morphology. The article demonstrates that their proposals are incompatible with syntactic analyses of word formation and emphasizes that second language researchers must ensure that models of second language acquisition are…

Responds to a reanalysis of study findings that refute the claim that negative evidence can lead to parameter setting in second-language acquisition, presenting empirical evidence from French learners of English, suggesting that positive second-language acquisition data do not guarantee the loss of native language parameter settings. (26…

Defends the full transfer/full access (FT/FA) model, which hypothesizes that the initial state of second-language (L2) acquisition is the final state of L1 acquisition (full transfer) and failure to assign a representation to input data will force subsequent restructuring. The article considers two other competing hypotheses as well as several…