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Background: Research in the US found that gratitude increases happiness. We conducted three studies to examine whether gratitude increases happiness among Koreans, as well., Methods: Participants were randomly assigned to a gratitude or a control condition in Studies 1 and 2, and into a gratitude toward someone important or a gratitude toward own health condition in Study 3. Their moods were then measured., Results: Gratitude writing marginally significantly evoked indebtedness among Korean students (Study 1, N = 336) but not among American students (Study 2, N = 219). Equally important, even among Americans, those who wrote about their gratitude toward someone important reported feeling indebtedness marginally more than those who wrote about their gratitude toward something or someone not that important. In Study 3 (N = 181), American participants, randomly assigned to write about their gratitude toward someone important, reported not only more gratitude but also more indebtedness than those assigned to write about their gratitude toward their own health., Conclusions: Taken together, these studies suggest that gratitude evokes indebtedness when gratitude is about someone important., (© 2018 The International Association of Applied Psychology.)

The present study examined cultural differences in the act of sharing positive events with others, called capitalization attempts. The first three studies tested whether capitalization attempts differ between two cultures using multiple methods: self-reports (Study 1), children's storybooks (Study 2), and Facebook (Study 3). We found that Koreans are less likely to share their positive events with others than European Americans. Study 4 further examined the antecedents and consequences of capitalization attempts. We replicated the earlier findings that Koreans are hesitant to share their positive events and demonstrated that this is because Koreans are more concerned about the potential negative consequences for social relationships. Moreover, we found that the cultural differences in capitalization attempts partly account for mean-level differences in well-being between cultures. Implications for capitalization, culture, and well-being are discussed.

Research has demonstrated that certain genotypes are expressed in different forms, depending on input from the social environment. To examine sensitivity to cultural norms regarding emotional support seeking as a type of social environment, we explored the behavioral expression of oxytocin receptor polymorphism (OXTR) rs53576, a gene previously related to socio-emotional sensitivity. Seeking emotional support in times of distress is normative in American culture but not in Korean culture. Consequently, we predicted a three-way interaction of culture, distress, and OXTR genotype on emotional support seeking. Korean and American participants (n = 274) completed assessments of psychological distress and emotional support seeking and were genotyped for OXTR. We found the predicted three-way interaction: among distressed American participants, those with the GG/AG genotypes reported seeking more emotional social support, compared with those with the AA genotype, whereas Korean participants did not differ significantly by genotype; under conditions of low distress, OXTR groups did not differ significantly in either cultural group. These findings suggest that OXTR rs53576 is sensitive to input from the social environment, specifically cultural norms regarding emotional social support seeking. These findings also indicate that psychological distress and culture are important moderators that shape behavioral outcomes associated with OXTR genotypes.

All individuals have multiple views of themselves. Whereas the consistency among the different aspects of identity is emphasized in Western cultures, the "multiple selves" are often viewed as coexisting realities in East Asian cultures. This research revisits the classic thesis in psychology that identity consistency is a prerequisite condition of psychological well-being. Between individuals (Study 1), people with a more consistent self-view had a more clear self-knowledge, were more assertive, and, most notably, had self-experiences that were less affected by the perspectives of others. Compared with North American participants (Study 2), Koreans viewed themselves more flexibly across situations, and their subjective well-being was less predictable from levels of identity consistency. Also, consistent individuals received positive social evaluations from others in the United States but not in Korea.