This study was aimed to examine the effects of smartphone overuse and individual factors including age, relationship with friends, satisfaction with school life, and time of smartphone usage on perceived cognitive functions, fatigue, and daytime sleepiness among college students. Methods: Three-hundred college students were recruited after confirming the absence of major depressive symptoms. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation, and multiple regression. Results: Smartphone overuse commonly explained the variance in perceived cognitive functions, fatigue, and daytime sleepiness, after controlling for individual factors. In addition, satisfaction with school life was significantly related with better effectiveness of cognitive functions while being male, having good relationships with friends and satisfaction with school life were relatively associated with a lower level of fatigue. Conclusion: The findings of this study revealed that the overuse of smartphone can serve as a psycho-cognitive burden leading to ineffective functioning in daily living. Students who are female and have issues regarding school life and friendship may be a high risk group for experiencing psycho-cognitive dysfunction associated with smartphone overuse. Further investigation is needed to develop effective interventions to improve psycho-cognitive health associated with the excessive use of smartphone in young adults.
The purpose of this study was to investigate the roles of the perception of aging symptoms in mediating and moderating the relationship between family function and stress in middle-aged adults. Methods: This was a cross-sectional correlational study of 244 middle-aged men and women. Self-administered surveys were conducted using the Family APGAR, stress index, and symptom management beliefs questionnaire. The data were analyzed using descriptive statistics, independent t-test, Pearson's correlation coefficient, hierarchical multiple regression analysis, and PROCESS macro using SPSS 23.0. Results: A significant interaction between family function and the perception of aging symptoms in predicting stress was found, indicating a moderating effect of the perception of aging symptoms on the relationship between family function and stress. An indirect effect of family function on stress through the perception of aging symptoms was not significant, indicating an insignificant mediating effect of the perception of aging symptoms. Conclusion: The relationship between family function and stress differed depending on participants' perceptions of aging symptoms. Individuals with negative perceptions of aging symptoms may be vulnerable to stress caused by poorer family function. It is necessary to develop programs to help modify negative perceptions of aging as well as strengthen family function to decrease the stress of middle-aged adults.
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