There has been substantial interest in mindfulness as an approach to reduce cognitive vulnerability to stress and emotional distress in recent years. However, thus far mindfulness has not been defined operationally. This paper describes the results of recent meetings held to establish a consensus on mindfulness and to develop conjointly a testable operational definition. We propose a two-component model of mindfulness and specify each component in terms of specific behaviors, experiential manifestations, and implicated psychological processes.We then address issues regarding temporal stability and situational specificity and speculate on the conceptual and operational distinctiveness of mindfulness. We conclude this paper by discussing implications for instrument development and briefly describing our own approach to measurement.

This study evaluated mindfulness-based cognitive therapy (MBCT), a group intervention designed to train recovered recurrently depressed patients to disengage from dysphoria-activated depressogenic thinking that may mediate relapse/recurrence. Recovered recurrently depressed patients (n = 145) were randomized to continue with treatment as usual or, in addition, to receive MBCT. Relapse/recurrence to major depression was assessed over a 60-week study period. For patients with 3 or more previous episodes of depression (77% of the sample), MBCT significantly reduced risk of relapse/recurrence. For patients with only 2 previous episodes, MBCT did not reduce relapse/recurrence. MBCT offers a promising cost-efficient psychological approach to preventing relapse/recurrence in recovered recurrently depressed patients.

In this study, the authors both developed and validated a self-report mindfulness measure, the Toronto Mindfulness Scale (TMS). In Study 1, participants were individuals with and without meditation experience. Results showed good internal consistency and two factors, Curiosity and Decentering. Most of the expected relationships with other constructs were as expected. The TMS scores increased with increasing mindfulness meditation experience. In Study 2, criterion and incremental validity of the TMS were investigated on a group of individuals participating in 8-week mindfulness-based stress reduction programs. Results showed that TMS scores increased following treatment, and Decentering scores predicted improvements in clinical outcome. Thus, the TMS is a promising measure of the mindfulness state with good psychometric properties and predictive of treatment outcome.

Several models have explored the possible change mechanisms underlying mindfulness-based interventions from the perspectives of multiple disciplines, including cognitive science, affective neuroscience, clinical psychiatry, and psychology. Together, these models highlight the complexity of the change process underlying these interventions. However, no one model appears to be sufficiently comprehensive in describing the mechanistic details of this change process. In an attempt to address this gap, we propose a psychological model derived from Buddhist contemplative traditions. We use the proposed Buddhist psychological model to describe what occurs during mindfulness practice and identify specific mechanisms through which mindfulness and attention regulation practices may result in symptom reduction as well as improvements in well-being. Other explanatory models of mindfulness interventions are summarized and evaluated in the context of this model. We conclude that the comprehensive and detailed nature of the proposed model offers several advantages for understanding how mindfulnessbased interventions exert their clinical benefits and that it is amenable to research investigation.

Like other antidepressant treatments, CBT seems to affect clinical recovery by modulating the functioning of specific sites in limbic and cortical regions. Unique directional changes in frontal cortex, cingulate, and hippocampus with CBT relative to paroxetine may reflect modality-specific effects with implications for understanding mechanisms underlying different treatment strategies.

This study was designed to test the hypothesis that mindfulness involves sustained attention, attention switching, inhibition of elaborative processing and non-directed attention. Healthy adults were tested before and after random assignment to an 8-week Mindfulness-Based Stress Reduction (MBSR) course (n = 39) or a wait-list control (n = 33). Testing included measures of sustained attention, attention switching, Stroop interference (as a measure of inhibition of elaborative processing), detection of objects in consistent or inconsistent scenes (as a measure of non-directed attention), as well as self-report measures of emotional well-being and mindfulness. Participation in the MBSR course was associated with significantly greater improvements in emotional well-being and mindfulness, but no improvements in attentional control relative to the control group. However, improvements in mindfulness after MBSR were correlated with improvements in object detection. We discuss the implications of these results as they relate to the role of attention in mindfulness.

Responders to either treatment modality demonstrated reduced metabolism in several prefrontal regions. Consistent with earlier reports, response to CBT was associated with a reciprocal modulation of cortical-limbic connectivity, while venlafaxine engaged additional cortical and striatal regions previously unreported in neuroimaging investigations.

After developing a trait version of the Toronto Mindfulness Scale (TMS), we evaluated its reliability, its convergent validity with six other trait mindfulness measures, and its construct validity in relation to prior meditation experience. A sample of nonmeditators ( N = 218) and meditators ( N = 243) with a wide range of meditation experience completed the Trait TMS and the six other mindfulness measures. Internal consistency reliability of the Trait TMS was comparable to that of the original State TMS. Significant positive correlations were found between both TMS factors and the other mindfulness measures; however, in general, the correlations for TMS Decenter were higher than for TMS Curiosity. Scores for TMS Decenter were shown to increase with meditation experience, but this was not the case for TMS Curiosity. The TMS Curiosity factor may assess a unique aspect of the mindfulness construct. Implications of these findings in relation to future mindfulness research are discussed.