How can syntactic and learnability analyses inform each other, and thus deepen our understanding of syntax and its acquisition? This dissertation illuminates this question through three case studies in Korean syntax. I examine cases in which two structures that display distinct syntactic properties share extremely similar surface forms, thus…

The revised Speech Learning Model (SLM-r) postulates that learners with more precisely defined categories in their native language (L1) exhibit greater proficiency in acquiring sounds in a second language (L2). Despite its recent emergence, empirical studies validating this hypothesis remain scarce. This study aims to investigate the predictive…

Language ideologies can powerfully shape language learner perceptions and progress. This qualitative study investigated and reports findings based on analysis of interviews with 14 participants who self-identify as advanced users of Spanish. While dominant language ideologies in the U.S. often undermine learners reaching high levels of language…

This research consists of an eye-tracking study examining the efficacy of eye gaze indexing (EGIX) in manipulating viewer eye gaze and enhancing second language (L2) fingerspelling comprehension in American Sign Language (ASL) through a controlled laboratory experiment. The study consisted of two groups and two conditions, EGIX+/EGIX- to test the…

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…

High variability pronunciation training (HVPT) has been found to be successful for training various segmentals, such as the challenging /l/-/[voiced alveolar approximant]/ contrast, and suprasegmental features such as tone and pitch accent. These studies have found that HVPT is an effective method not only in helping learners improve their…

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…

This dissertation explores the experiences of adult English as a Second Language (ESL) learners in an Adult Basic Education (ABE) program. ABE/ESL learners are a unique but integral population within the language learning community and are largely excluded from the scholarly discourse. Research in the context of language learning and instruction…

Language learning is a complex issue of interest to linguists, computer scientists, and psychologists alike. While the different fields approach these questions at different levels of granularity, findings in one field profoundly affect how the others proceed. My dissertation examines the perceptual and linguistic generalizations regarding the…

The purpose of this qualitative, descriptive study was to explore how college English as a second language educators described how English as a second language learners used direct and indirect Language Learning Strategies in facilitating their learning at a higher education institution in the Southwest region of the United States. The research is…

The purpose of this qualitative exploratory case study was to explore how The Sims could be used to assist L1 English speakers in learning L2 Russian verbs of motion through completing in-game tasks in pairs while speaking Russian. English and Russian verbs of motion encode manner and path differently, and L2 Russian motion verbs use a variety of…

The partners of the Saudi students who come to the United States on scholarships to earn a degree (Bachelor's, Master's, or Ph.D.) are eligible for full scholarships as well. However, most of them fail to proceed in earning a degree or fulfill the language proficiency requirement needed to join an academic degree program. This study surveys…

Mastering the phonological aspects of a second language (L2) poses significant challenges for adult learners, often affecting their intelligibility in acquiring that language (Derwing, Munro, & Wiebe, 1998). McAllister (1997) has highlighted L2 learners' struggles in perceiving and producing novel segmental features, which is corroborated by…

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…

This study aimed to investigate the reasons for low enrollments in a related teacher preparation program alongside seemingly high attrition rates among instructors in the field of teaching English to adults and determine if any solution could be found to encourage people to not only enter the field but persist in the career. A review of current…