This study aimed to determine the mediating effect of stress on the relationship between residential environment satisfaction and feelings of depression in the elderly. To achieve the purpose of the study, the researcher personally conducted interviews with 250 senior citizens residing in Jeollanam-do, South Korea, from October to November 2019. SPSS version 27.0 and Hayes' PROCESS ver. 4.0 were used for data analysis. As a result of testing the research hypothesis, a partial mediating effect of stress on the relationship between residential environment satisfaction and feelings of depression was confirmed. Based on these results, diverse practical and policy suggestions were recommended. First, a connection between barrier-free walking and public transportation linking elderly residences and major living facilities (transportation facilities, medical facilities, cultural facilities, social welfare facilities, parks, etc.) was suggested. Second, the application of a universal design was proposed when remodeling or building elderly residences. Third, policies promoting social participation of the elderly and providing assistance to increase the intimacy of their relationship with family members and neighbors are necessary to enable older adults to maintain their social relationships. Fourth, programs, such as educational schemes that provide older adults with a greater understating of stress, must be developed in parallel to facilitate stress self-management interventions. In future, it is necessary to include additional mediating or moderating variables to generalize these findings to the larger population.

This study examines the mediating role of social withdrawal in the relationship between smartphone overdependence and quality of life in college students. These three factors were assessed in 125 college students enrolled at a college in South Jeolla Province, South Korea, from September to November 2019. Data analysis was conducted using SPSS version 27.0, including regression to test the research hypothesis and a Sobel test to assess the significance of the mediation. It was found that social withdrawal completely mediates the relationship between smartphone overdependence and quality of life in college students. Several means of improving the quality of life of college students are identified based on this finding. First, colleges could provide financial support for community programs such as membership training and club activities. Second, an in-college system could be built that enables early intervention in cases of social withdrawal in students. Third, closely linked programs could be designed to provide effective professional counseling to college students experiencing strong social withdrawal. Fourth, college faculty could receive psychoeducation on social withdrawal. Fifth, as various mediating variables may exist in the relationship between smartphone overdependence and quality of life and only social withdrawal was considered in this study, subsequent studies could consider the effects of more diverse psychological and social variables.

This study aimed to confirm the mediating effect of social capital on the relationship between a sense of connection to the mainland and life satisfaction as perceived by island residents. To that end, the study drew on original data from the Survey of the Welfare Status and Needs of Jeonnam Island Residents conducted by the Jeonnam Welfare Foundation from October 11 to November 1, 2017. The respondents (N = 500) were residents of inhabited islands in Jeollanam-do. The data were analyzed using SPSS version 26.0. The results indicate a partial mediating effect of social capital on the relationship between connection to the mainland and perceived life satisfaction. Based on these results, the study makes a number of practical and policy suggestions.