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Preceding research has demonstrated the positive relation between gratitude and well-being at the trait level, but less is known about the day-to-day association between them. This study investigated the within-person associations of gratitude with hedonic and eudaimonic well-being using a daily diary design. A sample of 363 young adults (M = 19.77, SD = 1.84) finished an online questionnaire once a day for 14 consecutive days. The results indicated that gratitude was positively related to hedonic and eudaimonic well-being on the same day, and gratitude positively predicted next-day hedonic and eudaimonic well-being, but not vice versa. We also found the reciprocal relation between the cognitive component of daily hedonic well-being (i.e., life satisfaction) and daily gratitude measured by the Gratitude Questionnaire. Moreover, these cross-lagged relations were not moderated by trait gratitude. These results provide supportive and convincing evidence for the positive effect of gratitude at the state level. [ABSTRACT FROM AUTHOR]

Mindfulness can be viewed as an important dispositional characteristic that reflects the tendency to be mindful in daily life, which is beneficial for improving individuals’ both hedonic and eudaimonic well-being. However, no study to date has examined the brain regions involved in individual differences in dispositional mindfulness during the resting state and its relation with hedonic and eudaimonic well-being. To investigate this issue, the present study employed resting-state functional magnetic resonance imaging (rs-fMRI) to evaluate the regional homogeneity (ReHo) that measures the local synchronization of spontaneous brain activity in a large sample. We found that dispositional mindfulness was positively associated with the ReHo in the left orbitofrontal cortex (OFC), left parahippocampal gyrus (PHG), and right insula implicated in emotion processing, body awareness, and self-referential processing, and negatively associated with the ReHo in right inferior frontal gyrus (IFG) implicated in response inhibition and attentional control. Furthermore, we found different neural associations with hedonic (i.e., positive and negative affect) and eudaimonic well-being (i.e., the meaningful and purposeful life). Specifically, the ReHo in the IFG predicted eudaimonic well-being whereas the OFC predicted positive affect, both of which were mediated by dispositional mindfulness. Taken together, our study provides the first evidence for linking individual differences in dispositional mindfulness to spontaneous brain activity and demonstrates that dispositional mindfulness engages multiple brain mechanisms that differentially influence hedonic and eudaimonic well-being. [ABSTRACT FROM AUTHOR]