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…

Teacher-student relationships (TSR) have been linked in research to a positive correlation with Student Academic Achievement (SAA). However, few of these studies have used empirical data to quantitatively link TSR to SAA. This study used an explanatory sequential mixed method design model to explain quantitative results through semi-structured…

Individual speakers' speech patterns differ from one another, despite presumably similar language input. What are the sources of this individual variability? In this dissertation, I explore sources of individual differences in pronunciation of coronal obstruents (/s/, /t[superscript h]/, /c[superscript h]/, /c/) at the ends of nouns in Korean.…

Since the COVID-19 pandemic, there has been an influx of virtual school enrollments and newly developed online programs. There is a body of research that supports online learning in higher educational settings but there is limited empirical evidence on the impact of online learning in K-12 settings, specifically with early learners. The purpose of…

Previous research has found mixed results for a link between executive function and perspective-taking. One proposed reason for this is that perspective-taking during comprehension tasks may not be internally reliable. This dissertation presents two large individual differences experiments with multiple perspective-taking during comprehension and…

The purpose of this quantitative comparative study was to examine differences in college-level math students' self-efficacy attributable to recent use of virtual reality (VR) learning environments and processes. The theoretical foundation for this study included connectivism, multi-dimensionalism and social cognitive theory, and self-efficacy…

This study examined the self-care habits and the feeling of burnout for public school administrators in the State of Illinois. The purpose of this quantitative study is to investigate the impact of self-care on the feeling of administrator burnout. Participants completed the Mindful Self-Care Scale (MSCS) and Maslach Burnout Inventory--Educator…

Statistical learning (SL), the ability to detect and extract regularities from inputs, has been considered as an early-maturing and domain-general mechanism that is critical for typical language development. However, recent evidence in neurotypical adults and children have found that individuals can vary in their SL abilities across linguistic and…

Prospective memory (PM), the ability to remember to execute an intention in the future, is critical for the performance of everyday tasks important for independence and quality of life. PM failures are associated with negative health, financial, and social outcomes, and are more frequent with increased age and can be even greater for older adults…

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,…

Annual data since 2012 shows college students' flourishing (a measure of psychological well-being) in continuous decline, with 2022 showing the largest decrease. Since the knowledge base of the predictors of flourishing is limited, how college executives can best address this issue is unclear. Variations in flourishing have been observed in…

Learning in a multimedia environment puts many demands on a learner's limited working memory, but this can become even more demanding as the level of distraction increases in a lesson. What has not been investigated much in previous literature is whether higher levels of distraction in lessons are more harmful to some learners than others. This…

This applied dissertation was designed to evaluate alternative and effective forms of instruction for young students with autism spectrum disorder. The researcher examined and compared the difference in the instructional formats of 1:1 discrete trial teaching and small-group discrete trial teaching. Targets were chosen in receptive language and…

This conceptual work examines the impact of the preexisting characteristics found among kindergarten through fifth grade-teachers who are more likely to implement culturally responsive teaching (CRT) practices in their instruction and daily routines. The Culturally Responsive Teaching Self-Efficacy Scale (CRTSE) was administered to participants…

This quantitative study examined the effects of stored color knowledge on learning achievement and cognitive load using a randomized pretest-posttest control group design. Social media was used to recruit 60 adult participants, randomized into control and experimental groups. A multimedia lesson was presented where the control group viewed images…