In this dissertation, I will present social-cognitive frameworks that support the use of mental imagery for possible self enhancement; and articulate and evaluate a pedagogical intervention designed for the foreign language class. This intervention will allow students to explore and develop prominent and vivid mental representations (self-schemas)…

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…

Native Arabic speakers used idiomatic expressions such as idioms, formulas, and collocations, in their daily communications. In learning Arabic as a second language (L2), effective communication requires "the ability to understand and use idioms appropriately and accurately in a variety of sociocultural contexts, in a manner like that of…

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…

While language aptitude and motivation are considered to be important contributors to second language (L2) attainment, two major gaps in the past research have been (1) a lack of nonlinear models stemming from a naive and tacit assumption that learning outcomes are linearly related to their predictors, and (2) a lack of unified and integrative…

Guided by Dynamic Systems Theory (DST) and multidimensional perspectives on individual differences (IDs) in instructed second language (L2) learning (e.g., Larsen-Freeman, 2014; Sun & Zhang, 2020), this longitudinal mixed-methods study focuses on three conceptually different categories of L2 learners' IDs: working memory (WM), motivation, and…

With the recent surge of online language learning, it is important to explore the different possible modalities of online learning and the factors that could influence the success of those modalities in language learning. This study found differences in (1) motivation, (2) anxiety, (3) perception of the learning community, and (4) oral proficiency…

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…

Adult learners often have difficulty reaching high proficiency levels in a foreign language, and curriculum experts are on a constant quest for innovative practices in foreign language learning. The problem addressed by this study was that even with the implementation of different pedagogical approaches, including immersion and technology…

The purpose of this explorative qualitative methods study was to examine students' motivations and proficiency of a foreign language in a top tier higher education environment. The study investigated the factors and motivations that affect students' proficiency in a foreign language. The qualitative methods included open-ended questionnaires,…

This research study examined the process by which non-English speaking students, whose first language is Arabic, learn mathematics in English. Teachers' adaptation was investigated to reflect the effect of change in instructional methods. The effect of communication between teachers, and exchanging ideas about the efficient practice procedure to…

The 21st century perception of students and stakeholders (parents, teachers, administrators, and support staff, etc.) within the realm of world language study in a Midwestern, suburban school district varied sometime subtly and sometimes greatly. No particular study had been done to indicate what inspired students to enroll in world language,…

The ever increasing popularity of virtual worlds, also known as 3-D multi-user virtual environments (MUVEs) or simply virtual worlds provides language instructors with a new tool they can exploit in their courses. For now, "Second Life" is one of the most popular MUVEs used for teaching and learning, and although "Second Life"…

Under the premise that vocabulary learning in a Spanish as a second language in-class environment may be affected by the instructional approach adopted by the instructors or the materials followed, this study explores the influence of rather distant teaching styles, such as implicit and explicit approaches, on the learning outcome of Spanish…

This study examined the second language (L2) development of adult learners of Spanish at three levels of proficiency during and after a semester of instruction. A fundamental goal was to identify cognitive and psychosocial individual differences (IDs) that can explain between-learner variation over time in order to expand our understanding of the…