This commentary discusses some theoretical and methodological issues related to research on the spacing effect in second language acquisition research (SLA). There has been a growing interest in SLA in how the temporal distribution of input might impact language development. SLA research in this area has frequently drawn upon the rich field of…

In this commentary, the author defends the Multiple Grammars (MG) theory proposed by Luiz Amaral and Tom Roepe (A&R) in the present issue. Topics discussed include second language acquisition, the concept of developmental optionality, and the idea that structural decisions involve the lexical dimension. The author states that A&R's…

This article questions how two very similar sets of experiments can yield such very different findings, and comments on the differences between the studies. Here Annamarie Kerkhoff presents a commentary on some perceived differences between the studies in areas such as age groups and group sizes evaluated. Kerkhoff also comments on some…

It is argued that new phonological features can be acquired in second languages, but that both feature acquisition and feature re-assembly are affected by the robustness of phonetic cues in the input.

There is a long linguistic tradition in which language change is explained in terms of first language acquisition. In this tradition, children are considered to be the agents of language change, or at least the agents of changes in the underlying grammar. Since the early 1980s, this has been formulated in the (generative) terminology in terms of…

In accord with the general program of researching factors relating to ultimate attainment and maturational constraints in adult language acquisition, this commentary highlights the importance of input differences in amount, type, and setting between naturalistic and classroom learners of an L2. It is suggested that these variables are often…

Responds to Ellis (2002), which suggests the statistical structure of the linguistic environment is a crucial and relatively neglected variable in language learning. This approach makes three assumptions about cognition and language learning that are not universally shared. Describes a distributed, instance-based approach that retains key features…

Discusses frequency effects in language acquisition. Provides an example of how frequency may relate to grammatical judgments of nonnative speakers acquisition of multiple wh-questions. (Author/VWL)

In response to Ellis (2002), which focuses on frequency in language processing, language use, and language acquisition, this article argues in favor of a role for frequency in several areas of second language acquisition, including interactional input and output and speech processing. Also discusses areas where L2 acquisition appears to proceed…

An author reacts to a series of responses written in regard to an earlier article by the author on frequency in language processing, language use, and language acquisition. Addresses a number of issues raised in the responses and concludes by emphasizing that language acquisition is a process of dynamic emergence and learners' language is a…

Responds to comments made regarding an earlier article written by the author on processing instruction in second language learning. (Author/VWL)

In response to Ellis (2002), which resurrects the notion that language acquisition consists of frequency-based abstraction of regularities from input, this article suggests Ellis ignores fundamental and well-known problems, including the poverty of the stimulus, cases of instantaneous acquisition, and evidence for innate knowledge. (Author/VWL)

Responds to Ellis (2002), which focuses on frequency in language processing, language use, and language acquisition. Contextualizes the frequency factor in terms of the evolution of second language acquisition (SLA) research. Suggests that although relevant and important, the frequency factor requires greater definition and qualification.…

Reviews processing (PI) instruction, outlines a model of input processing, describes the nature of PI, and discusses research on it to date. (Author/VWL)

Responds to VanPatten's update of the findings for processing instruction. Questions the explanatory adequacy of the model of input processing that VanPatten proposed and that underpins his pedagogic proposals. Questions the validity of the limited-capacity, single-resource model of attention proposed for second language learning. (Author/VWL)