In critical period hypothesis (CPH) research, native speaker (NS) norm groups have often been used to determine whether nonnative speakers (NNSs) were able to score within the NS range of scores. One goal of this article is to investigate what NS samples were used in previous CPH research. The literature review shows that NS control groups tend to…

This study assesses research and reporting practices in quantitative second language (L2) research. A sample of 606 primary studies, published from 1990 to 2010 in "Language Learning and Studies in Second Language Acquisition," was collected and coded for designs, statistical analyses, reporting practices, and outcomes (i.e., effect…

This article provides a comprehensive synthesis of research on language attrition to date, with a view to establishing a theoretically sound basis for future research in the domain of second language (L2) attrition. We identify the variables that must be tracked in populations who experience language loss, and we develop a general model for the…

The fundamental difference hypothesis (FDH), as formulated by Bley-Vroman (1990), claims that SLA tends to be nonconvergent because domain-specific linguistic mechanisms available in early childhood cannot be used for language learning in adulthood: Instead, second language (L2) learners deploy domain-general problem solving skills. I claim that…

This article reviews previous studies of the effects of implicit and explicit corrective feedback on SLA, pointing out a number of methodological problems. It then reports on a new study of the effects of these two types of corrective feedback on the acquisition of past tense -ed. In an experimental design (two experimental groups and a control…

The goal of this epilogue is to use the methodological contributions of the studies presented in this special issue as a starting point for suggestions about methodology in conducting future interaction research. As is the case in most developing fields, interaction research develops methods internally as it continually borrows and extends…

This article considers the implications of two central constructs of sociocultural theory (SCT) for second language (L2) development: mediation and internalization. It first discusses Vygotsky's general theoretical claim that human mental activity arises as a consequence of the functional system formed by our biologically specified mental…

Presents data on the past and present state of research on the interlanguage hypothesis, with specific attention to its extension to children. Outlines a dual approach to developing a theory of second language acquisition--a macrobehavioral approach and a neurofunctional approach. Finally, problems for the interlanguage hypothesis are discussed.…

Variation in three representative teacher input variables are compared across second language studies to derive viable hypotheses about instructional factors that contribute to second language development. The review indicates that, while the quality and quantity of comprehensible input are important, interactive pedagogical behaviors are also the…

Illustrates some of the problems of second language (French) acquisition by adult Spanish-speaking immigrants in a natural setting through analysis of the European Project data (Perdue, 1982) in three areas: acquisition and use of the over-generalized marker "c'est"; acquisition of reference to time; and acquisition of reference to space.…

A "system" comprising the learner-speaker, the specific linguistic system itself, and the interactions with native speakers is posited to explain the dynamics of the acquisition of French as a second language. Through self-regulation, this system devises solutions which pertain to that common area in language at the crossroads of variation,…

The foreign language classroom is considered a legitimate and important arena for educational and linguistic research. Research projects developed through a French survey include: an analysis of the foreign language classroom through diary studies; and an analysis of classroom discourse of teachers and pupils. (Author/CB)

Describes processes of facilitation involved in exolingual conversation (interactions between persons who are dynamically adjusting their respective linguistic performances) between foreign language learners and native speakers, concluding that such behavior is dynamic and creative, and incapable of being described and defined within predetermined…

Examines language as a multimodal sensory enhancement system, integrating recent neuroanatomical and neurophysiological findings on the ontogenesis of neuronal structures with the generative concept of Universal Grammar for determination of fundamental differences between primary and secondary language acquisition. (Author/CB)

Briefly describes the rationale, history of development, and current status of the "proficiency-based" testing movement in the United States. and cites areas in which additional research and development work are recommended to enhance both the validity and the practical value of this approach. (Author/LMO)