This study addresses the psychosocial challenges of loneliness and social conflict among elderly residents at Panti Sosial Tresna Werdha Wana Seraya. The research aims to develop and evaluate the effectiveness of the HARMONI intervention program in reducing loneliness and improving social interaction. Employing a quantitative pre-experimental one group pretest-posttest design, the study involved six purposively selected elderly participants. Data were collected using the UCLA Loneliness Scale, non-participant observation, and semi-structured interviews. Data analysis included normality tests and paired samples t-tests for quantitative data, and triangulation for qualitative data. Results showed a statistically significant decrease in loneliness scores after the intervention, with participants demonstrating increased social engagement and positive behavioral changes. The findings suggest that the HARMONI program is beneficial for enhancing social connectedness and emotional well-being among institutionalized elderly. Future research should involve larger samples and longer intervention periods to strengthen generalizability and practical application.
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