Background: The Self-Regulation of Eating Behavior Questionnaire (SREBQ) is an economical way of assessing an individual’s self-regulatory abilities regarding eating behavior. Such scales are needed in the German population; therefore, the purpose of the present study was the translation and validation of a German version of the SREBQ. Method: First, we conducted a pilot study (Study 1; N = 371) after the translation procedure. Second, we assessed the final scale in a representative sample of the German population (Sample 2; N = 2,483) and its underlying factor structure. Further, we tested for measurement invariance and evaluated the SREBQ’s associations with related scales to explore convergent and discriminant validity. Finally, we considered differences in SREBQ based on sociodemographic variables and provided derived reference scores (norm values). Results: Factor analysis revealed deficiencies in the original model. Thus, we shortened the scale based on statistical considerations and the adapted version showed improved fit in Confirmatory Factor Analysis and reliability. We also found evidence for partial strict invariance, which means the measure is equivalent for the tested groups of age and gender. Item and scale psychometric properties of the shortened version were satisfactory. In terms of diagnostic validity, it was shown that individuals with higher body mass index (kg/m2) have worse self-regulation of eating behavior than those with lower. Conclusion: In sum, the SREBQ evidenced good validity and reliability and is suitable for application in medical, psychological, and nutritional research.

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Considering a wide range of student's delinquencies and problems, preventive intervention in school is strongly required for healthy student development. American School counselor Association (ASCA) has focused on three areas, academic development, career development, and personal/social development to provide various skills and learning opportunities for the successful life of students. During the past 50 years, psychologists have concentrated on the disease treatment model. However, unlike this psychological trend, positive psychology has paid attention to prevent school violence and delinquency. Further, Positive psychologists have discovered not only to prevent problems but also to facilitate human strengths and virtues to live successful and happy life. Therefore, the purpose of this study was to investigate the causal relationship between components of positive psychology and student development. More specifically this research examined the influence of hope, optimism, and self-regulation on student's academic achievement, career development, and social development. This quantitative study included 507 6th grade elementary school students and their parents living in Seoul, South Korea. Four conceptual models were developed to investigate the best fit model to examine the causal relationship between hope, optimism, and self-regulation and student's academic achievement, career development, and social development. Structural Equation Modeling (SEM) was employed to analyze the data. Confirmatory Factor Analysis (CFA) was used to explore measurement model and Path Analysis was engaged in to discover structure model. The results of SEM analysis provided major findings. There was a causal relationship between hope and student's academic achievement, career development, and social iv development. However, it was not confirmed the causal relationship between optimism and student's academic achievement, career development, and social development and between selfregulation and student's academic achievement, career development, and social development. Further, a structural model on the causal relationship between hope, optimism, self-regulation and student's academic achievement, career development, and social development was not statistically significant. Implications and suggestions for future research are discussed.

Differentiation concerns teachers’ strategies and methods to design teaching in response to the natural variation in heterogeneous classrooms. In this study, it is looked upon as a method of inclusion in English teaching to enhance the students’ learning regardless of their levels. The present study aims at exploring teachers’ experiences of working with differentiation in the English upper secondary classroom, in order to discuss strategies that are used, challenges that are faced, and outcomes that are noticed when applying differentiation. Six teachers of English in different schools were interviewed to obtain their experiences. The data was collected via semi-structured interviews and the participant’s answers were analysed and categorised into various themes. Although the results revealed that the participants utilized differentiated teaching to meet the students' different learning styles and interests, all participants described teaching English in heterogeneous classrooms as a challenge. They referred to the outcomes of applying differentiation and how it can have an impact on students’ individualized learning. According to all the participants in this pilot study, the most effective solution to manage heterogeneous classrooms is applying differentiation. Nevertheless, they all agreed that there is no simple way of applying it and teachers can choose different contents and methods for teaching English to help students reach their learning objectives.

The strength model of self-control suggests that self-regulation and self-control processes are governed by finite internal energy resources. However, this perspective has recently come under scrutiny suggesting that self-control processes are not solely constrained to limited resources and may also be guided by motivational-cognitive processing. Self-efficacy theory and control theory are two theoretical views of self-regulation that also suggest self-regulation failures are dependent on motivational-cognitive processes; however the potential role of limited resources has not been evaluated in the context of these theoretical views. This dissertation sought to advance our understanding of self-regulation and self-control of exercise behaviour by integrating the three theoretical perspectives discussed above. Study 1 showed that self-control depletion leads to reductions in task self-efficacy mediating the self-control depletion – negative performance change relationship. Overall, findings are consistent with self-efficacy theory. However the results are limited as the mechanism(s) leading to reduced self-efficacy following self-control depletion remain unclear. Study 2 explored a sequential (serial) mediation model investigating the idea that exerting self-control leads to an altered psychophysiological state increasing subjective fatigue, which in turn, leads to reduced self-efficacy to exert self-control and reductions in physical self-control performance. Findings supported the proposed sequential mediation model. However, it remains unclear to what extent that self-efficacy plays a passive or active role guiding self-controlled behaviour following self-control depletion. Study 3 explored the independent and interactive effects of self-control depletion and normative performance feedback on self-efficacy and physical self-control. Findings showed an interaction between self-control depletion and feedback. Findings support predictions of control theory when self-control resources are intact, but suggest feedback information is processed differently when self-control strength is depleted. Overall, results show that when self-efficacy is manipulated by feedback the effects of self-control depletion on performance are no longer evident supporting self-efficacy’s role as an active causal mechanism determining behaviour. / Dissertation / Doctor of Philosophy (PhD) / Self-control failures are at the heart of many societal problems. A dominant theoretical view suggests self-control is governed by a limited internal resource. However, this perspective has recently been opposed by theorizing and evidence suggesting that people experience self-control failures due to shifts in motivational-cognitive processes. This thesis integrated three theories of self-control (i.e., strength model of self-control, control theory, and self-efficacy theory) in an attempt to provide a more complete understanding of why self-control failures occur for people performing demanding physical exercise. Findings suggest that each theoretical perspective provides complementary explanations for why self-control failures occur and how they can be overcome through shifts in cognitive processing. Specifically, self-control exertion leads to subjective fatigue, which decreases self-efficacy to exert self-control, and in turn reduces self-control performance. Furthermore, after self-control exertion, positive normative performance feedback increases self-efficacy and subsequent self-control performance whereas negative feedback drastically reduces self-efficacy and performance.

This dissertation investigates the complex dynamics of digital communication, highlights the unique stressors it places on college students with attention-deficit/hyperactivity disorder (ADHD), and advocates for adopting interdisciplinary methods to enhance their participation in online communication environments. While online interviewing has become increasingly common in the employment domain, it poses unique difficulties for individuals with ADHD, who may struggle with self-regulation and communication skills. Due to the absence of physical presence, online interviews pose a significant challenge to individuals in perceiving and responding to the nuanced range of non-verbal cues, which can greatly impact the effectiveness of their communication. To advance this investigation, the dissertation presents three manuscripts examining the self-regulation behaviors of college students with ADHD during online job interviews. It also proposes strategic interventions to alleviate their challenges and actively participates in the discussion on empowering these individuals to navigate the digital communication realm successfully. The first manuscript provides a comprehensive literature review of the current use of technology in higher education to prepare students with disabilities for online interviewing. The second manuscript presents a research study investigating self-regulation behaviors in students with ADHD during simulated online interviews using physiological measurements. The third manuscript focuses on how postsecondary educators can integrate self-regulation and aspects of neuroscience in their daily pedagogy. Overall, the results from these chapters illustrate the specific challenges faced by students with ADHD in online interviews and emphasize the significance of self-regulation strategies. By equipping students with effective self-regulation skills, postsecondary institutions can enhance their employment opportunities and overall success. These manuscripts contribute to a broader understanding of ADHD, self-regulation, and online interactions, informing future research and support strategies in the evolving context of virtual employment interviews.

In this thesis, I explore 42 autistic individuals’ transitions into further and higher education (FHE) in England, drawing on personal experience as well as interview data. I was diagnosed with Asperger’s Syndrome in 1998 at the age of 13. At the age of 15, my mother introduced the topic to me, and autism soon became the foundation of my socio-political identity. The discussion is divided into three themes; stigma and perception management strategies, formal and informal support networks and the interplay of autism with institutional factors. I draw upon Tringo’s (1970) work on the hierarchy of impairment and Goffman’s (1963) work on stigma. Tringo’s (1970) hierarchy of impairment led me to my intra-communal hierarchy of impairment (perpetuated by autistic individuals against autistic individuals) and Goffman’s (1963) work on stigma led me to my four degrees of openness; autistic individuals can be indiscriminately open, or indiscriminately reticent, but openness if relevant, and openness if necessary, are more common strategies. UPIAS’ (1976) work on the social model of disability laid the foundation for my socio-political identity and this thesis. I argue autism has been largely absent from the political arena. I outline how there are four ideals; the ideals of self-regulation, normalcy, ability and independence. Eager to conform to these ideals, eager to self-present as ‘independent’, ‘self-regulating’, ‘normal’ or ‘capable’, some autistic students are reluctant to request support and accommodations, complicating the transition to FHE.

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