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…

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…

A sentence interpretation experiment conducted with university-age native English speakers, Japanese English as a second language (ESL) speakers, and native Japanese speakers (N=12 per group) suggested caution in attempting to typify languages on the basis of processing strategies drawn from probabilistic tendencies evident in grouped data.…

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…