In this final article in this guest-edited issue on synergies in second language acquisition and teaching (SLA/T), we attempt to bring together the main content of this issue in an overall, combined synergy statement, concluding this project as a whole. Let us remind readers of the project: A shared effort by 17 scholars taking 11 different…

Framed by family language policy (FLP), in conjunction with the Douglas Fir Group's ecological transdisciplinary framework for second language acquisition, this multiple case study investigates the FLPs of two Hmong-American families in relation to a Hmong-English dual-language program (DLP) where their children are enrolled. Interviews,…

Chinese immersion programs have been increasingly popular in US schools. However, we have insufficient data on young English-speaking children's acquisition of Chinese as a second language in these programs, and specifically on social contextual variables systematically promoting or hindering Chinese language use. Taking a variationist…

In the Yoruba community, proverbs are regarded as Yoruba philosophy repository, with wisdom, brevity, criticality, and stored experience that are believed to be a viable tool of acquiring the language. Hinging on reversing language shift model theory, the study investigated: (a) whether Yoruba proverbs are effective in the acquisition of Yoruba…

Although most children learn to communicate in their first language (L1), there is normal and expected variation in their rate of acquisition across all components of the language system. Until recently, most second language acquisition and second language (L2) researchers have assumed that individual differences (IDs) in L1 acquisition are small…

For language learners who aspire to become multilingual, commitment involves a personal journey. Defining persistence as a preoccupation with goal-focused action directed to a desired future state and drawing on research from cognitive psychology and the mental time travel paradigm, this article presents an identity-based framework of persistence…

The affective turn in the second language (L2) acquisition literature has witnessed a shift from the periphery to a clear focus on emotions. Nevertheless, this shift tends to examine emotion separately from cognition. Vygotsky's "perezhivanie" provides a theoretical lens to explore the inextricable interconnectedness of emotion and…

This article presents a conceptual replication of Hashimoto and Egbert (https://doi.org/10.1111/lang.12353), a study that featured multivariate models where lexical sophistication variables accounted for word difficulty (yes-no recognition) better than frequency alone among learners of English as a second or foreign language from North America.…

Empirical work exploring additional language (L+) learning emotions has both proliferated and expanded its focus over the past 15 years. The current article explores one possibility for responding to the challenge of capturing and describing emotions in order to furnish a more contextualized, multidimensional picture of emotions in L+ learning:…

This study investigates the role of prosodic cues and explicit information (EI) in the acquisition of German accusative case markers. We compared 4 groups of 3rd-semester learners (low intermediate level) who completed 1 of 4 Processing Instruction (PI) treatments that manipulated the presence or absence of EI and focused prosody. The results…

This study conceptualizes lexical sophistication as a multidimensional phenomenon by reducing numerous lexical features of lexical sophistication into 12 aggregated components (i.e., dimensions) via a principal component analysis approach. These components were then used to predict second language (L2) writing proficiency levels, holistic lexical…

Elicited imitation requires listeners to listen and repeat sentences as accurately as possible. In second language acquisition (SLA) research it has been used for a variety of purposes. Recently, versions of the same elicited imitation test (EIT) have been created in 6 languages with the purpose of measuring second language proficiency (Ortega…

In the present study, we examine the effects of prompts and recasts on the acquisition of two new and different grammar structures in a task-based learning environment. Sixty-four 14-year-old 9th grade students (low intermediate) learning German as a foreign language were randomly assigned to three conditions: two experimental groups (one…

Understanding the relationship between teachers' use of language in teacher-led discourse (TLD; Toth, 2008) and opportunities for L2 development is a well-established area of SLA research. This study examines one teacher's role in creating such opportunities in TLD in her EFL classes in a state secondary school by examining the inner resources…

This study investigated the acquisition of specialized vocabulary from L1 and L2 textbook reading by 64 Slovak high school students who were intermediate or advanced users of English. The students were divided into two groups: One group read the academic texts in their L1, the other group in their L2. In a posttest and a delayed posttest, they…