درخت حوزه‌های تخصصی

Objective : Despite significant antiemetic advances, almost 50 % of treated cancer patients still experience nausea and vomiting. The purpose of this study was to investigate the mediating role of avoidant coping in the relationships between psychological well-being and chemotherapy-induced delayed nausea in women with breast cancer in Shiraz. Method : The research method was descriptive-correlational. The statistical population of this study consists of women with breast cancer in Shiraz with an average age of 51 to 56 years. In this research, a non-random and voluntary sampling method was used; thus, 211 female patients with breast cancer treated by chemotherapy voluntarily completed the relevant questionnaires, which included psychological well-being questionnaire (Ryff, 1989), chemotherapy-induced delayed nausea questionnaire (Rhodes & McDaniel, 1999), and coping style questionnaire (Endler & Parker, 1990). The data were analyzed by AMOS software. Results : Research findings showed a negative and significant relationship between psychological well-being and avoidant coping style, and a positive and significant relationship between avoidant coping style and delayed nausea. The Sobel test confirmed the mediating role of avoidant coping style in the relationship between psychological well-being and delayed nausea. Therefore, it can be concluded that there was a relationship between psychological well-being and delayed nausea, with the mediation of avoidant coping style. Also, psychological well-being had an indirect effect on delayed nausea. Conclusion : Chemotherapy-induced delayed nausea can be reduced by improving coping skills and strategies and the psychological well-being of women with breast cancer.

Objective: This study aimed to investigate the relationship between self-directed learning (SDL) and problem solving, with a focus on the mediating role of self-regulated learning (SRL) and the moderating role of gender among Iraqi university students. Method: A correlational research design was employed. The statistical population included all the students of Qadisiyah University in Iraq in the academic year 2023-2024. A sample of 300 students were selected using a convenience sampling method. Data were collected using the Problem-Solving Inventory (Cassidy & Long, 1996), The Self-Directed Learning Readiness Scale (Cheng, Kuo, Lin & Lee-Hsieh, 2010), and the Motivated Strategies for Learning Questionnaire (Pintrich & De Groot, 1990). Data was analyzed using Pearson correlation coefficient and Structural Equation Modeling (SEM) with SPSS and AMOS software. Results: The results indicated a good model fit. SDL had a direct impact on problem solving. Additionally, SRL partially mediated the relationship between SDL and problem solving. However, gender did not significantly moderate the relationship between SRL and problem solving. Conclusions: The findings suggest that increasing SDL and SRL among students can enhance their problem-solving skills.

Objective: The current study investigated the impact of COVID-19 on lifestyle and cognitive function, overweight, and sleep quality among children and adolescents in Abyek city during the quarantine period. Method: In this study, a descriptive-analytical research method was used, and a combination of stratified and multi-stage cluster sampling was employed for sampling. The study population included 2152 students (1184 girls and 968 boys) from elementary and middle school levels in Abyek city. Data were collected using electronic questionnaires, which were a compilation of the Food Frequency Questionnaire (FFQ localized in 2009), Beck Physical Activity (Beck et al., 1982), Cognitive Function (Nejati et al., 2013), and Pittsburgh Sleep Quality Index, sent online to the students. Subsequently, the collected data were analyzed and examined. Findings: This study found no significant correlation between students' BMI and their dietary habits or physical activity level (p > 0.001, rs = 0.45) as well as between physical activity level and dietary habits or cognitive performance. However, there was a significant positive correlation between sleep quality and physical activity level scores (p < 0.011, rs = 0.26), and between cognitive performance and sleep quality (p < 0.001, rs = 0.49). Regarding gender differences, male students had a higher Body Mass Index (BMI) and physical activity level compared to female students (p = 0.018 and p < 0.001, respectively), and there was a significant difference in dietary habits between boys and girls (p = 0.006). No significant difference was observed between boys and girls in terms of sleep quality and cognitive performance (p = 0.180 and p = 0.693, respectively). Conclusion: According to the study, it appears that changes in diet, physical activity, and sleep quality affect students' cognitive performance during the COVID-19 quarantine. These results indicate that planning to maintain and control physical activity, nutrition, and sleep quality during quarantine is essential to mitigate potential negative effects on students' cognitive performance.