The strand of feedback research within the field of Instructed Second Language Acquisition (ISLA) examines the effects of feedback on the development of second language (L2) knowledge and learning behaviors. While findings often make claims about the relationship between feedback and language processing, much of this research has not measured…

The United States government is perennially in need of employees with proficiency in critical foreign languages to communicate with foreign counterparts and maintain relationships worldwide. In order to fulfill this need, the government devotes significant resources training federal employees to advanced levels of language proficiency through…

To date, most classroom-based research into the learning of a third language (L3) in the US has examined patterns of acquisition among various groups of bilinguals. Situated mainly within the context of "Portuguese for Spanish Speakers" (PSS), studies typically group learners based on the sequence / age of onset of their main background…

This dissertation explored Beninese English teachers' prior experience in writing in English and its implications for teaching writing in English in the Benin Republic. Grounded in a social constructionist paradigm, this dissertation used a qualitative research approach with initial survey, autobiographical narrative essay, and interviews to…

This mixed-methods study investigated the effectiveness of multimedia instruction for phrasal-verb education with community-college English as a second-language learners (ESL) in Northern California. Previous researchers have found that ESL learners have difficulties and barriers in learning phrasal verbs, and other researchers have found that how…

Despite some rises and falls in the numbers due to various reasons, including the political climate in the Trump era and the COVID-19 pandemic (Laws & Ammigan, 2020), each year universities in the United States host a large number of multilingual international students from different parts of the world. Based on their TOEFL scores, many are…

Leveraging the effectiveness of Concept-Based Language Instruction (C-BLI) in language teaching and learning, including in the teaching of specific linguistic features of target languages (Negueruela, 2003; Van Compernolle, 2012), pragmatic elements such as sarcasm (Kim & Lantolf, 2018), and even discipline-specific concepts (e.g., Casal,…

This dissertation explores Spanish copular verbs, "ser" and "estar" (both 'to be' in English), in pre-adjectival contexts within two Spanish varieties: first-language (L1) Chilean speakers from Santiago (N = 29) and second-language (L2) English-speaking learners studying in Chile (N = 31). Bridging sociolinguistics and second…

This study investigates the role of prior knowledge in supporting Japanese foreign language (FL) learners' L2 higher order thinking skills. Scholars recognize prior knowledge integration as the critical stage where learning occurs (Anderson et al., 2001; Britton, 1994; Kintsch, 1988, 1998), and consider it an untapped resource in the FL classroom…

Since the 1940's, the United States has opened its doors for international students to study and gain knowledge and skills within its borders. However, there are considerable concerns about the integration of these international students and their participation in the classroom. Most international students hail from different cultural and social…

Uganda Baptist Seminary (UBS) is accredited by the Ugandan National Council for Higher Education and teaches church leaders from Uganda and its surrounding seven countries. The required language of educational instruction is English, although the students come from a multitude of different native languages. This research stems from a need to…

This dissertation investigates the longitudinal development of Chinese language proficiency among students in a Chinese as a Foreign Language (CFL) Flagship Program at an American public university from 2014 to 2024. Using Bayesian multilevel regression models, this study assesses the trajectories of listening, speaking, and reading proficiency…

A common drawback in traditional language education is that all students in the same class use the same content. Since students may have different backgrounds such as prior knowledge and learning speed, one single curriculum may not be able to accommodate every student. Unfortunately, most students cannot afford personalized language learning,…

The vast development of digital technology and the widespread use of social network platforms have reshaped how we live in the world. For L2 learners to maximally utilize their language proficiency to function effectively as members of modern society, they need not only the necessary L2 knowledge, skills, and abilities (KSAs) but also essential…

In this dissertation, I investigated how cognitive resources as well as formal, and informal language experience impact language learning in two studies. In the first study (Chapter 2), I examined the learning of Spanish grammatical gender by Chinese international students who were studying abroad in the US. The goal of that study was to uncover…