Mindfulness – nonjudgmental awareness of the present moment - has recently garnered significant attention in psychological literature for decreasing clinical symptoms. Certain personality traits such as emotionality, however, can predict higher levels of anxiety and depression. The present study examines whether mindfulness mediates the relationship between personality traits and perceived stress and depression in nonclinical populations. A total of 321 participants from two samples—American and Japanese undergraduates —self-reported scores on measures of mindfulness, personality, perceived stress and depression. Cross-cultural comparisons following measurement invariance tests also allow for insight into the definition of mindfulness, especially given the Eastern religion origin of mindfulness. Results demonstrate that mindfulness partially mediates the relationships between personality clinical symptoms, particularly for extraversion and conscientiousness. These results can play an important role for developing mindfulness-based treatment and prevention programs and bridge an important gap between Western conceived and Eastern religion mindfulness. / Includes bibliography. / Thesis (M.A.)--Florida Atlantic University, 2015. / FAU Electronic Theses and Dissertations Collection