This dissertation outlines three studies investigating linguistically diverse students' (including bilingual and monolingual students) language use and self-efficacy in writing. Bilingual students are those who speak a language other than English, including students with various levels of English proficiency and language experience. The first two…

The goal of this study is to contribute to the field of Japanese pedagogy by examining how Japanese native speakers and learners of Japanese as a foreign language with American cultural backgrounds take stances in discussions in Japanese. As stancetaking is a fundamental human behavior (Du Bois & Karkkainen, 2012; Iwasaki, 2015; Kiesling,…

Acquisition of the perfective marker "-le" in Mandarin Chinese is a daunting task for second language learners. To date, there has been no consensus on what it is about "-le" that makes it such a challenge to learners. This study investigates the acquisition of "-le" from both a lexical perspective and a discourse…

Learner corpus research has expanded from focusing primarily on English as a second language (L2) to include languages such as L2 Spanish, reflecting the growing importance of corpus linguistics in second language acquisition (SLA) research. In this context, and because prompts are the means by which learner corpora gather their texts, it has…

This study investigates the acquisition and maintenance of periphrastic and se-passives in second language (L2), heritage (HS), and (Spanish-dominant) native Spanish speakers (NS) by addressing: (i) How accessible are Spanish periphrastic passives (which also exist in English) and se-passives (unique to Spanish) for L2ers and HSs in production?…

Communication is fundamental to the human condition but is impaired in life-altering ways for more than 2.4 million individuals with aphasia in the United States. Individuals with aphasia identify discourse-level communication (i.e. language in use) as a high priority for treatment. The central premise of most aphasia treatments is that restoring…

This study investigated if a relationship existed between teacher language use in the foreign language classroom and student proficiency, student to teacher rapport, and teacher preparedness by their university program or district trainings. The researcher used a language use questionnaire data, pre- and posttest data, and focus group responses to…

This study explored the language ideologies of Saudi cosmopolitan parents living in Western countries, their family language policies, and their children's reintegration into Saudi society. I used a qualitative research design to investigate the process of family language policies and practices and the underlying social, cultural, and religious…

This qualitative case study of a high school world language (WL) classroom with flexible language boundaries (Cummins, 2012; Creese & Blackledge, 2010; Garcia & Li Wei, 2014; Turnbull & Daily-O'Cain, 2009) examines how proficient L1 readers constructed meaning from authentic L2 text as emerging bilinguals. Grounded in sociocognitive…

This qualitative study explores the current practices of K-12 foreign language teachers (FLTs) in using the target language (TL) within an urban school district in the Midwest United States. Focusing on how FLTs engage in professional development (PD) to optimize their TL use in the classroom, the study investigates the strategies and knowledge…

Teachers encountered difficulties implementing 90% of Target Language (TL) use and tried various strategies to promote it. This qualitative case study investigated secondary foreign language teachers' perceptions and experiences of following the district's recommendation to use 90% and above of TL in their classrooms in a school district in the…

This longitudinal case study investigated the developmental trajectories of two participants enrolled in an ITA oral communication course at Purdue University. The course provides language support to the ITA population who play a crucial role in higher education programs in the U.S. (Gorsuch, 2016). Over four months (i.e., one semester), I…

With the increasing number of young emergent multilingual language learners in transnational contexts, there is a growing need to explore and examine how emergent multilingual children develop their translingual competence and how they exercise their agency to engage in translingual practices across different settings (e.g., home and school). Yet,…

Enabling learners to successfully use their second language (L2) in meaningful ways is a critical goal of instruction. Ultimately, most learners want to meet the L2 demands of the contexts in which they will use the language. To accomplish this, learners must develop linguistic knowledge and apply it in a manner that is contextually appropriate…

Discourse markers (DMs) are linguistic forms characterized by their use as conversation organizers or pause fillers (Fox Tree, 2010). Although used frequently in both speech and writing, DMs are not often taught in L2 classrooms, despite incorrect usage causing potential misunderstandings (Polat, 2011). Additionally, L2 learners have been observed…