This article presents a theoretical review of and methodological guidelines for the study of two key notions in second language acquisition research, complexity and difficulty. The term "complexity" has gained considerable currency over the past decades and has taken on a wide range of meanings. We argue for a more restricted…

This article presents the use of conversation analysis (CA) in the context of sociocultural theory (SCT) driven research on L2 development, or CA-for-SCT. I focus specifically on the CA concept of action ascription as it applies to understanding the nature of mediation in interaction. I begin with an overview of the concept of action ascription…

This reflective piece seeks to shed light on the numerous contributions of Diane Larsen-Freeman to theory construction, applied linguistics, and language education by drawing parallels and insights from the FIFA 2022 Qatar World Cup Final. Looking at the multitude of factors that affect both soccer games and language development research,…

This paper is part 4 in a series of workshops that examine the properties of some simple models of vocabulary networks. This Workshop explores how the overall activity level of a vocabulary network can be altered by changing the connections in the network (i.e., by implementing relinking events). The Workshop is linked to an online practice room…

In this article we address two key questions in the application of dynamical systems theory (DST) to second language acquisition (SLA) that have not been resolved in recent debates about this issue. The first question relates to reductionism. Is an antireductionist position a necessary element of DST? We show that the radical antireductionist…

Despite the range of varieties of Han Chinese, Mandarin is the most widely studied variety in research on Chinese as a heritage language (CHL) around the world. To better understand the role of other varieties of Han Chinese in addition to Mandarin, this article presents a synthesis of research on the learning of Chinese varieties in formal and…

This study examines how second/foreign language (L2) word difficulty estimates derived from item response theory (IRT) and classical test theory (CTT) frameworks are virtually identical in the context of vocabulary testing. This conclusion is reached via a two-stage process: (a) psychometric assessments of both approaches and (b) L2 word…

The present study assesses linguistic and geographic diversity in selected outlets of SLA and multilingualism research. Specifically, we examine over 2,000 articles published in specialized top-tier journals, recording the languages under study and their acquisition order, author affiliations, the country in which the research was conducted, and…

This paper puts forward a research agenda in the area of explicit and implicit knowledge and learning of second or additional languages. Based on a brief overview of reliable findings as well as open questions in the field, three agenda items are highlighted. First, valid and reliable measures of explicit and, in particular, implicit knowledge and…

Speech perception research has commonly relied on untrained listeners to provide impressionistic judgments of second language (L2) speech, and training listeners has been rare. The current study therefore explores the implications of training novice listeners (NLs) to rate accented speech. A total of 60 listeners were recruited, 30 who remained…

This special issue revisits a classic topic in linguistic theory, A-bar movement, applied to developing and bilingual grammars. We claim that A-bar movement, or filler-gap dependencies, is still the quintessential linguistic phenomenon to illustrate the interaction between the biological endowment, the experience with language (past and present),…

A process of abstraction initiates the development of a theory of applied linguistics, beginning with the distinction between technical norm and technical fact. Each applied linguistic intervention has a normative dimension and a factual interface with its users. The second step is to abstract the qualifying technical modality of these artefacts,…

Against the backdrop of greater emphasis on learner centredness and growing attention to learners' voices in recent decades, concerns have been raised over researchers' dominance in shaping research scope and findings. Whether it be quantitative, qualitative, or mixed-methods research, learners' voices are mostly absent at the methodological…

The initial high expectations of applied linguistic work did not endure. Applied linguistics is divided between adopting either a modernist or a postmodernist approach. Despite their relevant critique of modernism, the relativism promoted by postmodernist perspectives is an inadequate response to the challenges of the field. A non-reductionist…

This paper gives an account of the impact of spaces of linguistic non-understanding and spaces of linguistic partial understanding in the first author's linguistic ethnographic doctoral study of lawyer-client communication within UK immigration legal advice meetings. The paper uses the researching multilingually framework as a lens for exploring…