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 the United States has a population with diverse linguistic and cultural backgrounds, multilingual education has been greatly influenced by monolingual and raciolinguistic ideologies (Flores & Rosa, 2019; Garcia, 2014; Ruiz, 1984). With world language enrollment continuing to decline (Lusin et al., 2023), investigation of the lived…

The present dissertation examined the initial state of L3 phonology in native speakers of French and German who were Spanish-English bilinguals. The present work analyzed perception (Chapter 3), production (Chapter 4) and the perception production interface (Chapter 5). The results revealed that these bilinguals are influenced by both of their…

Instruction for students classified as English Learners (EL-classified) in the US has been dominated by formalist orientations to language that focus instruction on acquiring decontextualized linguistic forms often as a prerequisite to mainstream classroom learning (Valdes et al., 2014). Many language scholars argue that these formalist…

Increased global migration and a myriad of other social and political factors has made today's universities more diverse than ever. As a result, teachers in higher education regularly find multilingual learners from a variety of different linguistic and cultural backgrounds in their classrooms and must consider this diversity in their teaching.…

In recent years, Third Language Acquisition (TLA) in Cross-Linguistic Influence (CLI) research has been debated regarding background languages' impact on learning a target language. While Second Language Acquisition (SLA) research often emphasizes the primary influence of the first language (L1) on the target language, it does not discount the…

This study explores the establishment and evolution of an informal online community, tracing how it developed and evolved. More specifically, the study analyzed the characteristics of the online space, as well as how members engaged within the community, including participation patterns, preferences, and opinions and identity construction. The…

The purpose of this study was to understand the current reality of multilingual learner supports in schools in Greater Minnesota and align that current reality with the Minnesota Learning English for Academic Proficiency and Success (LEAPS) Act in order to make recommendations at the local level and advocate at a greater scale. This was an…

This dissertation explores first language (L1) transfer and second language (L2) transfer processes and models, such as the full transfer/full access model (FT/FA), the representational deficit/interpretability hypothesis, and the feature reassembly hypothesis (FRH). The typological proximity model (TPM), the cumulative enhancement model (CEM),…

Advances in Natural Language Processing (NLP) over the past decade have largely been driven by the scale of data and computation used to train large neural network-based models. However, these techniques are inapplicable to the vast majority of the world's languages, which lack the vast digitized text datasets available for English and a few other…

Bilingual speakers present a natural phenomenon called code switch (CS) when communicating, where bilinguals or multilinguals alternate their languages during discourse. However, code-switching between two languages does not mean children cannot differentiate between the languages. Rather, code-switching is considered a common aspect of…

There has been increasing L3 research on L3 transfer selectivity, especially concerning which factor triggers crosslinguistic influence during L3 acquisition. According to Slabakova's (2016) Scalpel Model, every linguistic property has distinct and unique input factors regarding L3 acquisition such as high/low frequency or positive/negative input.…

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…

Using Self Study in Teach Education (S-STEP), this research examined the ways in which my utilization of Linguistic Landscape (LL) as a pedagogical tool contributed to developing teacher candidates as future educators. In doing so, this study aims to highlight the use of LL as an effective pedagogical tool for developing Critical Multilingual…

This dissertation contributes new data to the debate on the source and manner of transfer in third language (L3) acquisition. The "L1 Status Factor" (L1SF, e.g., Hermas, 2010; Leung, 2002; Lozano-Pozo, 2003) maintains that the transfer source is the native language (L1), whereas the "L2 Status Factor" (L2SF, Bardel & Falk,…