This dissertation delves into second language acquisition, sociophonetic variation, and speech perception, investigating how prior linguistic experiences and exposure to regional variations in a second language influence the decoding of dialectal linguistic cues. It aims to enhance the understanding of words pronounced with different phones and their impact on spoken language comprehension. The study involves 108 English-speaking Spanish learners, categorized based on their exposure to Spanish regions with /s/ weakening and /s/ retention. This categorization reflects their level of language exposure and perception of regional variation, considering that around 50% of Spanish varieties exhibit /s/ weakening. The participants' exposure to /s/ weakening varies based on their backgrounds, previous exposure, study abroad experiences, and teacher origins. The study employs various experimental tasks, including a language proficiency test, a listening comprehension activity, an AX discrimination task, and a language background questionnaire. Data analysis involves logistic mixed-effects models and correlation analyses. Results show that participants exposed to conditions where /s/ changed from reduced to retained in isolated word pairs exhibited lower identification accuracy compared to consistent word pronunciations. An important finding is a significant interaction among participants with experience abroad in an /s/ weakening environment when contrasting /s/ weakening with full retention of the sibilant sound. The study also explores how learners' ability to categorize regional phonetic variants affects their listening comprehension. It reveals that accuracy in the AX discrimination task predicts their performance in listening comprehension, demonstrating that strong performance in the former translates to better comprehension. Additionally, the research examines the influence of participants' language attitudes on their task performance. In summary, this dissertation underscores the significant impact of exposure to regional language variations on individuals' identification accuracy and language processing skills, emphasizing the need to recognize linguistic diversity in language education and research.

In the last decade, the educational field, in general, has experienced increasing interest in applying augmented reality (AR) for educational purposes. Studies have shown that when AR is effectively applied in education, it can increase students’ learning interest and concentration (Zhang et al., 2014), reduce cognitive overload (Bower et al., 2014, p.1), and provide a more authentic learning experience (Klopfer, 2008). This study uses both cognitive and sociocultural theoretical perspectives to better understand the role of AR in peer interaction by investigating language-related episodes (LREs) during collaborative dialogue. The current study investigates whether mobile-based AR influence the number, nature, outcome, and correction orientation of LREs during two oral and writing-focused activities of ten advanced L2 Spanish dyads using AR and non-AR mobile applications. The results show significant differences in the incidence of LREs in both settings (AR vs non-AR) and modality focus (oral vs writing-focused). Although significant differences were found between mechanical LREs vs. lexical and grammatical LREs, no significant differences were found between lexical and grammatical LREs in both modalities and settings. Likewise, the correction orientation was similar in both modalities, whereas the LRE outcomes were significantly different in both settings. Immediate posttests were administered to determine whether participants retained the results of the LREs based on the LRE outcome types. The posttests showed a strong correlation between the recognition and production scores of the grammatical structures. However, no significant differences were found in the recognition or production of grammatical structures nor the production of lexical items between the two settings.

In a growlingly digital world, scholars must understand the changes in textuality and communication associated with Web 2.0 technologies to incorporate potential pedagogical benefits to language curricula. For example, with the affordance of these technologies, language learners (LL) are increasingly exposed to language contact zones found both on and offline. A practice that could potentially support the communicative practices of LL within these multilingual spaces is translanguaging, or the use of strategies employed by LL when engaging with diverse codes by utilizing the resources of their semiotic repertoire as well as their language(s). Previous research has focused principally on contexts of bilingual education and identity formation vis-à-vis translanguaging. Therefore, the present study is the first to examine the actual translanguaging practices of second language (n=5) and heritage language learners (n=5) of Spanish in a digital language contact zone: Facebook affinity spaces, or common interest spaces. The dynamic data gathered from screen capture recordings of the participants’ interactions and think-aloud protocols in the affinity spaces, stimulated recall interviews, and written reflections were analyzed using content analysis and critical discourse analysis.

This analysis revealed key findings in the data that focused on translanguaging practices, negotiation strategies, and performative competence - or the procedural knowledge which focuses on how learners communicate rather than what they communicate. First, the participants displayed a preference toward the separation of languages in written output, adhering to the ideals of linguistic purism, while simultaneously engaging in translanguaging practices via non-linguistic semiotic resources, such as the use of emojis, in their communication. Second, the participants’ self-reported proficiency levels for their writing abilities in Spanish correlated with their use of outside digital resources as a mediation tool. The findings show that, theoretically, the conceptualization of communicative competence must be expanded in order to incorporate the languaging practices of interlocutors in digital contexts. Pedagogically, educators need to support the development of LLs’ digital literacies, or communicative practices that are facilitated by technology, and address the bias toward linguistic purism to help students reap the cognitive benefits offered by translanguaging practices.