The purpose of this study is to examine how psychosocial variables, such as adaptation, differs in various groups in two continuum model of mental health. It is hypothesized that ‘languishing’ group will show lower level of psychosocial abilities than the ‘flourishing’ group. High mental well-being, high mental disorder was classified as “struggling”, high mental well-being, low mental disorder as “flourishing”, low mental well-being, high mental disorder as “floundering“, and low mental well-being, low mental disorder as “languishing”. The participants consisted of 207 students from Seoul-based University and 115 attendees from a psychology workshop, totaling in 332 people. Korean Mental Health Continuum Short-Form (K-MHC-SF) was used to measure the frequency of mental health related experiences, Korean Mental Disorder Inventory (K-MDI) for measuring each index of mental health, Attribution Style Questionnaire, Trait Meta-Mood Scale (TMMS) for measuring perceived emotional ability, Social Support Scale for measuring social network size and interpersonal support, and Grit Scale (Grit–S) for measuring persistence of interest and work ethic. The results of this study are as follows. First of all, the level of psychosocial variables were significantly lower for the ‘languishing’ group than the ‘flourishing’ group. This supports the first hypothesis of this study. Secondly, the ‘struggling’ group showed higher level of social support than the ‘floundering’ group, a result similar to the ‘flourishing’ group. This result supports the second hypothesis, and indicates that even when there is a mental illness, adaptive resources can be utilized in social relationships if there is a high level of mental well-being. Finally, even without any mental illness, the ‘languishing’ group showed similarly low level of optimism as the ‘floundering’ group, which was expected to have the poorest adaptive characteristics. This result can be explained by the poor mental well-being of the ‘languishing’ group. These results indicate that the ‘flourishing’ group has higher level of socio-psychological ability than the ‘languishing’ group, and has similar level of adaptive potential as the ‘floundering’ group, leading to the validation of the two continuum model of mental health.