Purpose: The purpose of this study was to examine the effects of a care promotion program based on nursing students' self-understanding.Methods: A quasi-experimental approach using a randomized clinical trial pre- and posttest design was used. Participants were assigned to an experiment group (n=29) or control group (n=30). Data were collected from June 23 to September 8, 2017. The experiment group participated in a care promotion program based on self-understanding for 24 hours through eight

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... ssions covering eight different topics. The data were analyzed using t-test and repeated–measures ANOVA using SPSS/WIN 21.0.Results: Compared to the control group, the experiment group reported significant positive changes for college life adjustment (F=28.74, <i>p</i><.001), emotional intelligence (F=15.66, <i>p</i><.001), and interpersonal caring behavior (F=9.37, <i>p</i>=.003).Conclusion: Findings from this study indicate that care promotion based on a self-understanding improvement program with the application of group enneagram education is a useful intervention strategy to promote the care promotion program based on nursing students' self-understanding. Care promotion based on self-understanding will be utilized as an intervention program to form positive values of care and interpersonal relationship through care awareness, self-change, understanding of others and care experience in the group.