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Cultivating multiple aspects of attention through mindfulness meditation accounts for psychological well-being through decreased rumination

Authors Wolkin J

Received 14 January 2014

Accepted for publication 12 March 2015

Published 29 June 2015 Volume 2015:8 Pages 171—180

DOI https://doi.org/10.2147/PRBM.S31458

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 5

Editor who approved publication: Professor Igor Elman


Video abstract presented by Jennifer R Wolkin.

Views: 1032

Jennifer R Wolkin

Department of Psychiatry, NYU Langone Medical Center, New York, NY, USA

Abstract: In the last few decades, mindfulness meditation has gained prominence as an adjunctive psychotherapeutic technique. In fact, a vast literature of controlled studies has found that mindfulness meditation is related to improved mental health across a variety of disorders. Elucidating the components involved in mindfulness meditation’s positive impact on psychological well-being is an important step in more precisely identifying the populations that would most benefit from its therapeutic utilization. Yet, a consensus regarding the particular underlying mechanisms that contribute to these outcomes is very much limited. There are many reasons for this, including the inconsistent operationalization and use of mindfulness meditation across research investigations. Despite the elusive mechanisms, many studies seem to indicate that cultivating different aspects of attention is a feasible, consistent, and parsimonious starting point bridging mindfulness practice and psychological well-being. Attention in itself is a complex construct. It comprises different networks, including alerting, orienting, and executive attention, and is also explained in terms of the way it is regulated. This paper supports a previously suggested idea that cultivating all aspects of attention through mindfulness meditation leads to greater psychological well-being through decreased ruminative processes. Ruminative processes are decreased by engaging in both focused and receptive attention, which foster the ability to distract and decenter.

Keywords: mindfulness, attention, rumination, psychological well-being

Introduction

Meditation is not a monolithic practice, but is a broad term encompassing a multitude of techniques, including mindfulness meditation (MM). From a historical perspective, MM is thousands of years old and stems from ancient Buddhist philosophy.1 It was practiced with the goal of experiencing enduring happiness2 and the cessation of personal suffering.3,4 In the last two decades, MM has received considerable empirical attention, and is currently being promoted as a way to elicit psychological well-being.5,6

In fact, a vast literature of controlled studies has found that MM is related to improved mental health across a variety of disorders, including different anxiety disorders,79 depression,8,10 eating disorders,11,12 substance abuse,13 and chronic pain-symptom reduction.14 Also, a recent study alluded to the positive outcomes that mindfulness-based treatment might have on preventing those with mild cognitive impairment from developing Alzheimer’s disease.15

These studies speak to the positive clinical outcomes resulting from the application of MM to psychological interventions. Knowledge of the underlying mechanisms that contribute to these outcomes is however very much limited.16 Elucidating a more precise understanding of these mechanisms can likely lead to more precise application of MM across different clinical populations. Despite the clinical importance of delineating possible mechanisms, they are difficult to identify, given limitations to the study of MM as a construct. These limitations will be briefly expanded upon in a later section. Most important for this paper is the variability in the literature with regard to the variability with which MM is operationalized and applied.

Many theoretical frameworks have been set forth hoping to create clarity in operationalizing mindfulness, as well as elucidating its underlying mechanisms. Overall, research indicates that likely several putative mechanisms are involved. However, there also appears to be a consensus that attentional processes are important, acting as an essential bridge connecting mindfulness practice and psychological benefit.1721 For example, Phillipot and Segal assert that attentional control, reflexive awareness, and the capacity to suspend automatic responses reflect processes that promote regulation, which ultimately might account for the psychological benefits of MM.22 Examples of other suggested components will be delineated in a following section. A brief review of the multiple aspects of attention will be discussed later in the paper as well, as it is a complex construct in its own right, and clarification of its components, as well as the way it can be regulated, is often necessary in explaining its relationship with mindfulness and positive clinical outcome.19

Rumination, which is the tendency to revisit the same thoughts over and over again, often reflects a process during which attention is not intentionally directed.23 Deficits in sustained attention24 and set-shifting difficulties have been linked to many different forms of psychological difficulty.25 Notably, the same populations exhibiting these difficulties are more likely to ruminate.26 This paper proposes that the cultivation of many aspects of attention, as well as its ability to be regulated, leads to a reduction in ruminative thinking.

Taking the process further, this paper proposes that MM works in two ways to decrease rumination: 1) distraction is employed via the deliberate shift of attention from ruminative thoughts to the immediate here-and-now experience (ie, the breath), and 2) decentering is enabled, allowing for a shift from the content of the rumination to the nonjudgmental acceptance of the presence of transient thoughts. Both distraction and decentering are intricately connected with the regulation of focused attention (FA) and receptive attention (RA), respectively.

In summary, this review: 1) briefly reviews why defining mindfulness and therefore parsing its underlying mechanisms is challenging, 2) delineates different formulations of the components accounting for mindfulness’s impact on psychological well-being, 3) highlights and then proposes that an attention-based model is most consistent and salient in accounting for MM’s positive psychological well-being outcomes, and 4) parses out a previously suggested but little-researched idea that cultivating aspects of attention through mindfulness leads to psychological well-being by way of decreasing ruminative processes.

Materials and methods

Studies were identified using PubMed, PsycInfo, and Google Scholar using the following keywords both alone and in combination: mindfulness, meditation, attention, executive attention, attentional control, rumination, psychological functioning, psychological well-being. A manual review of references for each identified study and review paper was also conducted. Note that mindfulness practice and MM are used interchangeably here unless specifically stated otherwise.

Limitations to studying underlying mechanisms

Many MM studies have been criticized for their methodological limitations, which make it more difficult to elucidate underlying mechanisms. Many studies lacked control groups, were not randomized, used a “wait list” comparator, utilized different instruments to measure mindfulness, and predominantly relied on self-report.27 Most studies were cross-sectional, and thus precluded interpretation that there was some kind of causative effect or that elucidated factors could be maintained over time. Additionally, studies failed to take into account the length of practice (daily and total) needed,19 a priori meditation experience,28,29 and possible inherent attraction and openness to specific kinds of practice.27

Another limitation across the literature is the significant variance regarding the theoretical and actionable applications of MM as an intervention in psychological settings. This manifests in multiple ways.

First, the idea of mindfulness has become a colloquialism, and both MM and the word “mindfulness” are often used interchangeably. Technically, the former is an actual practice (action) utilized to cultivate the latter (state), which has often been characterized by an awareness of the internal and external present-moment milieu without engaging with it.30 In addition to being described as an actionable and traditional meditation practice, and as a state that is cultivated, the word “mindfulness” is also sometimes used to describe a dispositional psychological trait or an intervention. Therefore, the term “mindfulness” is often used loosely in the literature without differentiation, perhaps because there is considerable overlap between the four concepts.31

Second, many systematic differences in mindfulness-based protocols exist, and mindfulness-based psychological interventions encompass a wide range of practices. More traditional MM practices involved in cultivating mindfulness are differentiated from mindfulness-based interventions (MBIs),32 which include current adaptations applied to psychological settings. More traditional MM practices, including Vipassana meditation,33 originated thousands of years ago. They stem from ancient Buddhist philosophy, and are associated with long-term consistent practice geared toward spiritual development and a greater understanding of the universe.34 In the last few decades, MBIs have been stripped of any spiritual, religious, or moral context, and adapted to heal a variety of psychological conditions. For example, mindfulness training has most recently been incorporated into clinically oriented group-based meditation programs, including mindfulness-based stress reduction (MBSR),35 which was the first MBI.

However, even within the rubric of MBIs, there are differences. Some rely on the meditative practice of mindfulness, including MBSR35 and mindfulness-based cognitive therapy (MBCT).36 Others, such as dialectical behavior therapy (DBT)37 and acceptance and commitment therapy (ACT),38 are consistent with broad contemporary conceptualizations of mindfulness, but do not rely heavily on actual meditative practice.

The heterogeneity in the utilization of different MBIs makes it difficult to parse out particular mechanisms responsible for the clinical outcomes of MM. This variance is elucidated in Chiesa et al’s systematic review of neuropsychological outcomes of mindfulness in 23 studies.39 Of those 23, 15 were described as either prospective controlled or randomized controlled studies providing objective measures of cognition following MM. However, two studied the effects of MBSR,40,41 and three studied the effects of MBCT.4244 Others studied the outcomes after a Vipassana retreat,45,46 a brief nonspecific retreat,47 breathing programs48 sometimes labeled as “mindful breathing”,49 or MM,50 mindfulness induction,51 and MM practice.52 McMillan et al53 studied the effects of acceptance and commitment therapy, and Jha et al40 studied the effects of mindfulness-based mental fitness training.

Proposed components of mindfulness meditation

Many different researchers have proposed conceptualizations of mindfulness that account for the components of MM involved in mediating psychological well-being (Table 1).

Table 1 Proposed components of mindfulness meditation

Approximately two decades ago, John Kabat-Zinn, the pioneer of MM’s clinical use, introduced MBSR,35 which was developed to facilitate psychological well-being via two central components: 1) attentional skills and 2) development of a nonjudgmental attitude toward one’s experiences. More specifically, Kabat-Zinn35 described mindfulness as a state of sustained attention to present-moment internal processes (thoughts, feelings, physical sensations) with acceptance and without judgment. Bishop et al proposed a similar model, which was described as paying attention to the here and now with an orientation of curiosity, openness, and acceptance.5

According to Brown and Ryan, mindfulness is a single factor construct described as attention to and awareness of moment-to-moment experience.17 Shapiro et al described three axioms of mindfulness: intention, attention, and attitude.18

Baer et al conceptualized mindfulness as a five-factor phenomenon composed of correlated skills: 1) observing (attending to internal and external stimuli), 2) describing (mentally labeling these stimuli with words), 3) acting with awareness (attending to one’s current actions, as opposed to behaving automatically), 4) nonjudgment of inner experience (refraining from evaluation of one’s sensations, cognitions, and emotions), and 5) nonreactivity to inner experiences (allowing thoughts and feelings to come and go, without attention caught in them).54

Hölzel et al suggested that the benefits of MM are produced by a combination of distinct but interactive components, including 1) attention regulation, 2) body awareness, 3) emotion regulation (including reappraisal, exposure, extinction, and reconsolidation), and 4) change in perspective on the self.21

Farb et al asserted that mindfulness relies on attention to present-moment sensation and encompasses a sense of equanimity, which refers to the deferral of judgmental labeling of experiences (ie, “this thought is neither good nor bad”).55

Vago and Silbersweig suggested a model of MM that describes six neurocognitive component mechanisms that are highly integrated: 1) intention and motivation, 2) attention and emotion regulation, 3) extinction and reconsolidation, 4) prosociality, 5) nonattachment, and 6) decentering.56

Most of these conceptualizations include multiple contributing factors, but the cultivation of attentional skills appears to be a consistent factor throughout this literature (Table 1). According to Carmody,20 mechanisms of attention are the most parsimonious starting point from which other mechanisms of mindfulness can be extrapolated. Chiesa and Malinowski57 also indicate that cultivating skills of attention may underlie all other mechanisms that lead to psychological well-being. For example, it is through the cultivation of attentional regulation that a nonjudgmental vantage point toward experiences would even be possible.19

The feasibility of this conceptualization is also reflected in van de Weijer-Bergsma et al’s study, during which the subjects – adolescents with attention and impulse difficulties – performed better than baseline scores on sustained attention tasks subsequent to mindfulness training.58 Ellenbogen et al59 indicated in their study that after attention was deliberately directed to the neutral word of a neutral–negative word pair, subjects reported less negative affect when exposed to a subsequent mental stressor. This research makes a case for prioritizing the development of attentional skills as a consistent model considered to be fundamental to MM’s contribution to positive psychological outcomes.

Mindfulness meditation and attentional networks

Like MM itself, attention is not easily defined. Over two decades ago, Posner and Petersen conveyed their conceptualization of attention as a multifaceted construct made up of the three unique and differentiated yet overlapping networks called alerting, orienting, and executive attention (Table 2).60 The relationship between all three attentional networks is still not entirely known,61 but mindfulness practice has been linked to improvement in all three.

Table 2 Attention networks

Alerting, often referred to as vigilance, is identified as the most basic of the networks, and is associated with the ability to sustain and maintain attention over long periods of time.60,62 In MM, sustained attention is necessary for one to maintain awareness of a present-moment experience or on a specified object of attention (ie, the breath).5

Orienting, sometimes called selective attention,63 is either the reflexive or purposeful selection of specific sensory information within the context of a high-volume sensory experience.62,64 It is the way in which sensory input is selected, thereby limiting attention to a subset of possible sensorial inputs. It is often recognizable by head and eye movements toward the selected target.64,65 Phillipot and Segal suggested that MM entails the intentional placement of attention, and thus the ability to orient attention toward a specified object.22

Executive attention, sometimes called conflict monitoring, or switching, allows for the prioritization of attention in the context of competing cognitive demands: one can preferentially shift focus from one thing to another. Recently, Petersen and Posner presented an expanded model, which supports the conceptualization of two separate orienting and two separate executive networks, each with specific functions.64 The extended model also elucidates the key players in the executive attention network, including self-regulation, cognitive flexibility, and metacognitive awareness (Table 3). These components of executive attention are closely linked, and sometimes only subtle nuances distinguish between their functionality.18 Posner and Rothbart concluded that executive attention is the glue that holds together all self-regulatory processes.66

Table 3 Executive attention components

Self-regulation, often called self-control, is defined as the ability to monitor and modulate cognition, emotion, and subsequent behavior.64,67 Emotional self-regulation allows for the malleability of internal emotional responses to stressful situations,68 whereas cognitive self-regulation can include the regulation of overt behaviors.69 Intact ability to self-regulate is an essential human skill that has even been cited as a core mechanism by which the personal “self” is constructed.70 This underscores the need to cultivate self-regulation’s adaptive functioning, as failure to do so underlies psychological distress. Kabat-Zinn et al linked MM with the self-regulation of chronic pain.71

As described by Moore and Malinowski, cognitive flexibility is the ability to adapt to new and unexpected conditions.72 Similarly, Mirsky et al associated cognitive flexibility with the ability to adaptively change attentional focus.73 This ability is particularly relevant in MM, given the constant need to invest and reinvest attention to the present moment.74 Cognitive flexibility is often assessed with the Stroop task,75 which measures the extent to which interfering information impinges upon attentional focus. Studies have linked mindfulness with improved cognitive flexibility, and thus with the reduction of interference on the Stroop task.49

Metacognition has been defined as thinking about thinking.76 It is the conscious awareness of cognitive processes as they are occurring, and is often referred to as reperceiving or decentering.77 Decentering connotes a shift in perspective from a subjective relationship with experiences to one that is more objective. Thoughts, feelings, and cognitions are less narrowly contextualized within a personal framework. The ability to decenter has been linked to mindfulness training.77

Mindfulness meditation and attention regulation

Parsing out attention-regulation styles is as important as understanding the functionality of attentional networks in the elucidation of the mechanisms of MM. In fact, meditation practices are usually described by the degree to which they entail FA, also referred to as concentrative attention, and RA, also referred to as open monitoring (Table 4).19 Although sometimes likened specifically to open monitoring,78 mindfulness practice is distinguishable by its utilization of both FA and RA.19

Table 4 Attention regulation styles in mindfulness meditation

Focused attention

FA is restricted to a specific object, which is commonly the sensory experience of the breath going in and out.5 Ideally, attention is sustained, but as distractions arise, which can include thoughts, feelings, and physical sensations, a conflict is presented, as different stimuli are pulling for attention.19 Initially, it is difficult to maintain FA, yet after repeated practice, more enhanced attentional regulation is ideally developed,19 such that sustained attention becomes easier and distractions are less prominent. Therefore, conflict monitoring and redirection of attention are used to a lesser degree.79

Receptive attention

As consistent conflict monitoring becomes increasingly moot, there is less need for a specific object of focus (the breath). Instead, attention is receptive to the entire field of awareness and its “objectless” nature.40,80 Distractions are less of an issue with RA, as attention is distributed and extended to all events as they temporally occur.81 This context provides a “meta”-awareness of mental processes and creates the space to decenter and cultivate a nonjudgmental attitude to whatever is experienced in an entire field of mental awareness.82

FA and RA

In summary, mindfulness practice initially entails increased effort to redirect attention to an explicitly selected neutral object (often, this object is the breath) and ultimately sustain attention upon it. As practice continues (as one becomes more experienced), it becomes increasingly natural, and no explicit object of attention is required. According to Carmody,20 repeated practice allows one to notice attentional habits, and by doing so, attentional resources are less automatic. Ultimately, a more reflexive “meta”-awareness of usually implicit mental terrain is cultivated, and concurrent monitoring of multiple present-moment experiences takes place. Often, even with experience, attention is likely focused and broadened many times, as becoming adept at attending to each sensation as it unfolds in the moment is a continued process.83 Ultimately, through the utilization of both attentional regulation styles, one is mindful of the present moment, whether it includes a particular object or all salient stimuli.

Rumination

Rumination has been defined as a passive dwelling upon negative thoughts and emotions,84 which is frequently self-focused.85 Rumination is akin to a perseverative process, and often leads to a vicious cycle of unintentionally directed attention. In this way, the mind automatically goes from one potentially negative thought to another or to an associated conditioned component.86

Overall, increased rumination is negatively correlated with aspects of psychological health.87 It is a risk factor for the development of depression,88 can prolong negative mood,49 and has been implicated in depressive relapse.16 Although rumination is particularly studied with regard to depressogenic tendencies, Nolen-Hoeksema et al89 acknowledged its possible relevance in mediating other psychopathology. More specifically, rumination was found to be a predictor of anxiety,84 and is also negatively correlated with measures of self-esteem.90 Rumination is often maintained despite its contribution to continued psychological difficulty, because many people view it as an adaptive route to actually solving a problem.91 However, research has confirmed that mindfulness is more effective than rumination in coping with dysphoric mood.92 Rumination has been linked to distorted interpretation of life events, increased pessimism about the future, and poor interpersonal problem solving.93

Rumination has also been associated with attention difficulties; the same populations that exhibit deficits in sustained attention24 and set-shifting difficulties25 are also more likely to ruminate.26 Furthermore, rumination has often been associated with a general tendency to be cognitively inflexible,94 as reflected in making more perseverative errors and having more difficulty shifting set.95

Mindfulness meditation and reduced rumination

It was mentioned in this paper’s introduction that a vast number of studies had found that MM is related to improved mental health across a variety of disorders. The paper also previously emphasized that knowledge of the underlying mechanisms that contribute to these outcomes is very much limited. There is research that proposes that decreased ruminative thinking is particularly responsible for MM’s positive impact on psychological well-being. For example, Teasdale et al96 and Segal et al97 indicated that depressive relapse is prevented with MM practice via decreased rumination fostered by decentering. Ramel et al98 suggested that MM decreased ruminative thinking in those with lifetime affective disorders, and that increased practice was related to a trajectory of less rumination. Jain et al99 found that in a sample of college students, MM was associated with reduced distress by way of decreased rumination. Chambers et al100 found both a negative association between MM and rumination and a direct relationship between MM and effective emotion regulation. Campbell et al101 found decreased ruminative processes in women with cancer status after mindfulness training. Michalak et al102 studied the effect of an 9-week MBCT program on rumination and relapse in people with major depressive disorder. Their results indicated that increased scores on the Rumination Response Scale significantly predicted relapse, suggesting that rumination has a role in maintaining psychological difficulty.

Attention regulation enables reduced rumination during MM

This review supports MM’s role in improved or maintained psychological well-being through the mechanism of reducing rumination via attentional processes. The question remains as to how. This review suggests a two-step process. The first step entails distraction, and the second entails decentering. These steps correspond to the attention-regulation styles inherent to MM, as regulation is at the heart of the potential for changes in psychological functioning.19

Distraction and FA

As mentioned earlier, early on in one’s MM practice, when it entails FA, attention is sustained on the neutral sensation of the breath. While this skill is being cultivated, ruminative thought processes likely interrupt the effort to sustain this attention. The ability to switch attention (ie, conflict monitoring), however, ensures that one is constantly distracting oneself from ruminative thoughts via redirection of attention from rumination back to the breath.97

According to the response styles theory of rumination, distraction is a healthier response to stress than is rumination, and entails a deliberate direction of attention away from ruminative thoughts onto a pleasant or neutral stimulus.23 According to Broderick,92 distraction can decrease dysphoric mood. Nolen-Hoeksema and Morrow studied the effects of rumination and distraction on depressed mood, and found that subjects in the distraction group became significantly less depressed. Those in the rumination group became significantly more depressed.88

Without attentional redirection, the mind automatically elaborates.103 Therefore, if one is ruminating on one thought, associated thoughts, feelings, and sensations are likely to be elicited in a vicious cycle. The need for constant directing and redirecting from ruminations to the distraction of focusing on the breath nurtures regulatory processes.104 Therefore, it becomes possible to make a more adaptive choice as to where to place attention.86 Kabat-Zinn et al71 found that participants in their study placed particular importance on the direction and redirection of attention to the breath in maintaining ongoing psychological well-being well after the study was completed.

However, Nolen-Hoeksema et al noted that distraction is important, but ultimately only serves as temporary relief, because with distraction, avoidance is taking place. In the long term, avoiding and pushing away thoughts through distraction is as inefficient as clinging to them via rumination.89

Decentering and RA

MM utilizes the benefits of distraction, but then goes beyond it in cultivating a more adaptive response to distress. This is enabled through RA, during which attentional focus is broadened and one is encouraged to be aware of all experiences. One now has the space to actually notice patterns of overengagement in negative thoughts, as opposed to suppressing them through distraction.

Wallace and Shapiro105 indicated that cognitive flexibility provides “the mental space” with which to identify negative evaluations that would otherwise go unnoticed. Engaging in MM thus adaptively draws attention to negative thoughts, as opposed to suppressing them.

The ability to cultivate a broader range of awareness also cultivates the ability to decenter, which is enabled through enhanced metacognition, and allows for a stepping back from any possible secondary elaboration of ruminative thoughts. Thoughts are nonjudgmentally accepted as just thoughts that come and go.77,106

Studies have demonstrated that broadening one’s attentional focus is linked to positive emotional states, as thoughts and emotions are seen as fleeting “mental” events, as opposed to accurate representations of reality or reflections of personal truths. In fact, instead of engaging with the thought content, one can simply note, “I am having a thought”. When thoughts are seen as transient, one is more likely to feel disconnected to them. Thought processes are now examined from a distance, creating a shift away from “goal-based processing”, which actually results in decreased rumination.96

During both FA and RA, some kind of shift takes place. During the former, one’s ability to distract and redirect attention away from rumination and learn to sustain attention on the neutral breath reflects a literal shift in attention. During the latter, via the ability to decenter, one shifts attention from the content toward the process of a thought. Wallace and Shapiro suggest that this shift is particularly important in maintaining psychological well-being, as a thought becomes a mental event rather than an intrinsic part of one’s self.105

Summary and future directions

Given the research conveying MM’s impact upon psychological well-being, a growing number of mental health professionals are calling upon a technique with a long and meaningful history and applying its more modern iterations to treatment protocol. Despite the research regarding positive outcomes, specific mechanisms associated with mindfulness and well-being are unclear. A more precise look at these mechanisms is important in helping to create profiles of those populations most likely to benefit from MM in clinical settings.

There are many reasons that the mechanisms are somewhat elusive, including the ambiguity in the way mindfulness is operationalized, used, and researched. Research appears to indicate that attentional components likely play a role, and are at least a feasible and parsimonious starting point from which to learn more about how MM leads to positive psychological outcomes. Taking this point further, multiple aspects of attention interact to help decrease ruminative processes, which have been implicated in psychopathology. During FA, distraction by way of conflict monitoring and other regulatory processes enable greater sustained attention. Distraction can only go so far, however, without becoming avoidance. During RA, decentering is cultivated, which is in contrast to distraction, in that one is literally faced with all ruminative experiences as they occur in the moment. That vantage point allows for a more objective and less judgmental perspective. This perspective is more adaptive and reflected in greater psychological well-being.

Disclosure

The author reports no conflicts of interest in this work.


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