This dissertation is a quantitative analysis of language proficiencies through the lens of the dynamic model of multilingualism, using survival analysis to evaluate time until thresholds of foreign language proficiency are reached and nonparametric tests (Wilcoxon signed rank and Kruskal-Wallis) to compare proficiencies at distinct time intervals…

Although there has been much research on second language learning, minimal literature reports how language learners learn multiple foreign languages through immersion. Further, a majority of these previous studies have been conducted using exclusively quantitative methods. In response to these empirical and methodological gaps, the current study…

In many contexts of multilingualism, language learners can initiate communication in the target language (TL), or a contact language (such as English). Patterns of use emerging from these choices affect TL development. They also vary between individuals. Willingness to communicate (WTC) needs to be investigated in ways that capture these…

Studies over the past two decades have provided relevant data on the relationship between music and reading abilities although they fundamentally refer to aspects of the first language reading process of young children. The foreign language reading acquisition process of adult learners has, in this sense, been less explored. Research in this area…

In many contexts of multilingualism, language learners can initiate communication in the target language (TL), or a contact language (such as English). Patterns of use emerging from these choices vary between individuals and affect TL development. Willingness to communicate (WTC) needs to be investigated in ways that capture these variations. So…

Language repertoires have been traditionally construed as a set of chronologically determined compartments (first language, second language, etc.), a scheme which upholds several validity and ethical issues when operationalized in research and education (Ortega, 2019). Complex dynamic systems theory (also complexity theory, here CDST) has been…

An increasing number of adults learn more than one foreign language simultaneously. While the cognitive benefits of using multiple languages from birth have been studied extensively, little is known about possible cognitive benefits of learning multiple languages simultaneously in adulthood. Among the cognitive abilities which play a role in…

In this article, I argue that first language (L1), second language (L2) and third language (L3) acquisition are fundamentally the same process, based on learning by parsing. Both child and adult learners are sensitive to fine linguistic distinctions, and language development takes place in small steps. While the bulk of the article focuses on…

The goal of this brief article is to highlight a specific methodological consideration pertaining to the examination of linguistic transfer in sequential language acquisition: When and how can transfer be meaningfully disentangled from issues pertaining to developmental trajectories of the target language? While this methodological issue is…

This article introduces this special issue by declaring that the studies contained here build on the idea that multilinguals, in the sense of learners or speakers that have more than two languages in their linguistic repertoire, are different from bilinguals and monolinguals in various ways. Several authors in the area of third language…

This paper focuses on the importance of multilingual literacy in the 21st century and, specifically, how adult learners across the globe can develop multilingual literacy skills necessary for successful communication and global citizenship. The paper includes a theoretical (research background, definitions, critical framework) and a practical…

Recent years have witnessed major development in plurilingual pedagogies which support the use of learners' repertoire of languages in language learning contexts (Payant & Galante, 2022; Piccardo, 2013). However, little research has been undertaken to examine adult plurilingual learners' perceptions towards the use of their languages during…

Calls to diversify second language acquisition (SLA) (e.g., Ortega, 2013) have led to increased interest in multilingualism and inclusion of groups less represented in samples of university students, such as individuals at older ages. Nevertheless, we still have more questions than we do answers. This article outlines a research agenda targeting…

Traditionally, transfer is described as interference and consequently as an unintentional mechanism. More recently, however, the perception of control in transfer has changed and it is now commonly accepted that transfer can occur both automatically and strategically. Studies have previously employed think-aloud protocols during writing tasks to…

This article explores the potential implications of theorizing in translingualism and translanguaging for foreign language teaching and learning. I discuss key terminology and introduce a translingual continuum as a potential way to understand language use practices both within and across communities. I report on an exploratory study into the…