Research on mindfulness indicates that it is associated with improved mental health, but the use of multiple different definitions of mindfulness prevents a clear understanding of the construct. In particular, the boundaries between different conceptualizations of mindfulness and emotion regulation are unclear. Furthermore, the mechanisms by which any of these conceptualizations of mindfulness might influence mental health are not well-understood. The two studies presented here addressed these questions using correlational, self-report data from a non-clinical sample of undergraduate students. The first study used a combination of exploratory and confirmatory factor analyses to better understand the factor structure of mindfulness and emotion regulation measures. Results indicated that these measures assess heterogeneous and overlapping constructs, and may be most accurately thought of as measuring four factors: presentcentered attention, acceptance of experience, clarity about one's internal experience, and the ability to manage negative emotions. A path analysis supported the hypothesis that mindfulness (defined by a two-factor construct including present-centered attention and acceptance of experience) contributed to clarity about one's experience, which improved the ability to manage negative emotions. The second study developed these findings by exploring the mediating roles of clarity about one's internal life, the ability to manage negative emotions, non-attachment (or the extent to which one's happiness is independent of specific outcomes and events), and rumination in the relationship between mindfulness and two aspects of mental health, psychological distress and flourishing mental health. Results confirmed the importance of these mediators in the relationship between mindfulness and mental health.
Attentional state during acquisition is an important determinant of performance on direct memory tests. In two experiments we investigated the effects of dividing attention during acquisition on conceptually driven and data-driven indirect memory tests. Subjects read a list of words with or without distraction. Memory for the words was later tested with an indirect memory test or a direct memory test that differed only in task instructions. In Experiment 1, the indirect test was categoryexemplar production (a conceptually driven task) and the direct test was category-cued recall. In Experiment 2, the indirect test was word-fragment completion (a data-driven task) and the direct test was word-fragment cued recall. Dividing attention at encoding decreased performance on both direct memory tests. Of the indirect tests, category-exemplar production but not word-fragment completion was affected. The results indicate that conceptually driven indirect memory tests, like direct memory tests, are affected by divided attention, whereas data-driven indirect tests are not. These results are interpreted within the transfer-appropriate processing framework.
In the 1st part of the experiment, older and younger adults read a series of high-cloze sentence frames, each missing its final word (e.g., "She ladled the soup into her "). Subjects were instructed to predict the ending for each. For critical sentences, the predicted final word (bowl) was not shown. Instead, an unexpected but acceptable ending (lap) was provided as the target. On a subsequent indirect memory test in which subjects generated endings to medium-cloze sentences, older adults showed reliable retention of both the disconfirmed (bowl) and target (lap) endings. Younger adults showed retention of only the targets. Results are consistent with the Hasher and Zacks (1988) view that the impaired inhibitory mechanisms of older adults impede the abandonment of no-longer-relevant thoughts. Although age-related declines in memory are well documented (Burke & Light, 1981; Craik, 1977), definitive identification of the cognitive processes responsible for these changes has not yet been achieved. One prominent theory has argued that an age-related reduction in attentional capacity contributes to decrements in both the encoding and later retrieval of stimulus material. Such a reduction would place constraints on the processing of incoming information. As a result, there would be a diminished amount of effortful processing (Hasher & Zacks, 1979), which in turn would produce failures in memory
Both dispositional mindfulness and mindfulness-based interventions have been found to be associated with less psychological distress. The current study investigated three mechanisms by which mindfulness might exert its beneficial effects: emotion regulation, nonattachment, and reduced rumination. Correlational self-report data were collected from two independent, nonclinical samples of undergraduates. Structural equation modeling was then used to test the role of these three mechanisms in mediating the relationship between mindfulness and a psychological distress factor, consisting of measures for depressive and anxious symptomatology. The model was respecified based on the first sample and retested in the second sample. Results confirmed an inverse relationship between mindfulness and psychological distress. Furthermore, emotion regulation, nonattachment, and rumination significantly mediated this relationship.
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