Aging and Attentional Control: Examining the Roles of Mind-Wandering Propensity and Dispositional Mindfulness

Are Mindfulness and Mind-Wandering Opposite Constructs? It Depends on How Mindfulness is Conceptualised

This study investigated if trait mindfulness and its components, mindful attention, acceptance, and non-judging correlate negatively with self-reported and indirect markers of mind-wandering. The 552 participants of the study completed an anonymous online questionnaire consisting of trait mindfulness and mind-wandering scales. They also completed the computer-based Sustained Attention to Response Task (SART), an objective measure of mind-wandering. The total mindfulness score and acceptance and non-judging subscale scores were strongly negatively correlated with both self-reported trait mind-wandering (TMW) and SART indices of mind-wandering. In contrast, attention was significantly positively correlated with both. These findings suggest that trait mindfulness conceptualised as a multi-component construct, but not a uni-component one, is probably an opposing construct to trait mind-wandering. Furthermore, mindfulness and its components, acceptance and non-judging, are associated with a reduction in the more common form of SART errors. However, only the acceptance component made a unique contribution to the variance in TMW and SART performance. Therefore, it is advisable for researchers to specify whether they investigated mindfulness as a uni-component or multi-component construct. Furthermore, it would be beneficial if future research investigates the relationship of mindfulness and its components with mind-wandering further by also incorporating a measure of state mindfulness.

Positively framing mind wandering does not increase mind wandering in older adults

Age-related differences in mind wandering are robust, with older adults reporting less mind wandering compared to younger adults. While several theories have been put forth to explain this difference, one view has received less attention than others. Specifically, age-related differences in mind wandering might occur because older adults are reluctant to report on their mind wandering. The aim of the current study was to explicitly test this hypothesis. Older and younger adults completed a go/no-go task with intermittent thought probes to assess mind wandering. In one condition, participants were provided with standard instructions about how to respond to questions about their thoughts. In a second condition, participants were provided with a positive framing of mind wandering. Mind wandering was assessed both subjectively (i.e., via thought probes) and objectively (i.e., using different behavioral measures from the go/no-go task). The results of the study suggest that positively framing mind wandering did not impact rates of mind wandering or objective indicators of mind wandering for older or younger adults. Older adults reported less mind wandering, regardless of condition, compared to younger adults. Older adults also had generally better performance on the go/no-go task compared to younger adults. Bayesian analyses suggested that the main effect of framing condition, although not significant in Frequentist terms, did provide moderate evidence of an overall effect on mind wandering rates. We interpret the results as evidence against the reluctance hypothesis, consistent with previous work.

Attention-dependent coupling with forebrain and brainstem neuromodulatory nuclei changes across the lifespan

Attentional states continuously reflect the predictability and uncertainty in one's environment having important consequences for learning and memory. Beyond well known cortical contributions, rapid shifts in attention are hypothesized to also originate from deep nuclei, such as the basal forebrain (BF) and locus coeruleus (LC) neuromodulatory systems. These systems are also the first to change with aging. Here we characterized the interplay between these systems and their regulation of afferent targets - the hippocampus (HPC) and posterior cingulate cortex (PCC) - across the lifespan. To examine the role of attentional salience on task-dependent functional connectivity, we used a target-distractor go/no go task presented during functional MRI. In younger adults, BF coupling with the HPC, and LC coupling with the PCC, increased with behavioral relevance (targets vs distractors). Although the strength and presence of significant regional coupling changed in middle age, the most striking change in network connectivity was in old age, such that in older adults BF and LC coupling with their cortical afferents was largely absent and replaced by stronger interconnectivity between LC-BF nuclei. Overall rapid changes in attention related to behavioral relevance revealed distinct roles of subcortical neuromodulatory systems. The pronounced changes in functional network architecture across the lifespan suggest a decrease in these distinct roles, with deafferentation of cholinergic and noradrenergic systems associated with a shift towards mutual support during attention guided to external stimuli.

Age and sex-specific differences of mindfulness traits with measurement invariance controlled in Chinese adult population: A pilot study

Objectives

To examine the relationships of age and sex with mindfulness traits among Chinese adults with controlling for measurement invariance.

Methods

A total of 1777 participants completing the Five-Facet Mindfulness Questionnaire were included for analysis. Their age and sex information were also collected. Descriptive analysis, Pearson's Chi-Square test and analysis of variance were performed to test the age- and sex-specific differences, measurement invariance was examined by confirmatory factor analysis.

Results

Excellent data fit to the model indicated configural, metric, and scalar invariance across age and sex. Participants aged 60 or above scored significantly higher in dimensions of acting with awareness, nonjudging of inner experience, nonreactivity to inner experience, and the total scores than younger individuals, who had higher scores in the observing domain. In addition, females scored higher in describing and observing than males, while the latter had higher score in nonreactivity to inner experience.

Conclusions

The Five-Facet Mindfulness Questionnaire Mindfulness showed acceptable measurement invariance across age and sex in Chinese adult population. The old and the young differs in the traits of awareness, observing, nonjudging of inner experience, nonreactivity to inner experience and the total mindfulness level, while males and females varied in describing, observing and nonreactivity to inner experience. Individual differences should be considered and well addressed in future studies on mindfulness.

Psychological flexibility in older adulthood: a scoping review

OBJECTIVES

Psychological flexibility/inflexibility (PF/PI) is a core component of the acceptance and commitment therapy (ACT) model, which is gaining more attention in the geropsychological literature. This scoping review examines the size and scope of the research on PF/PI in older adulthood related to age differences between older adult and younger samples, correlates relevant to psychological health, and changes with ACT.

METHODS

A systematic literature search was conducted using PubMed, CINAHL, and PsycINFO. Peer-reviewed articles available in English were included that: had a mean age ≥65 and a minimum age ≥60; and reported self-report measures of PF/PI. We categorized PF/PI into three domains: open, aware, and engaged.

RESULTS

Forty-six articles were included. Most studies measured open or aware domains; few measured the engaged domain. Older adults evidenced greater awareness compared to younger adults (9 of 13 analyses were significant). Openness and awareness consistently yielded medium to large correlations with anxiety and depression. PF/PI did not relate with positive affect and inconsistently correlated with quality of life measures.

CONCLUSION

Despite emerging trends, variability and limitations were evident in the literature. Specifically, measurement issues, lack of conceptual clarity, and the omission of values and behavioral measures require future attention.

Executive function abilities in cognitively healthy young and older adults-A cross-sectional study

A prominent feature of cognitive aging is the decline of executive function (EF) abilities. Numerous studies have reported that older adults perform poorer than younger adults in such tasks. In this cross-sectional study, the effect of age on four EFs, inhibition, shifting, updating, and dual-tasking, was examined in 26 young adults (mean 21.18  years) and 25 older adults (mean 71.56  years) with the utilization of a pair of tasks for each EF. The tasks employed for DT were the Psychological Refractory Period paradigm (PRP) and a modified test for everyday attention, for inhibition the Stroop and Hayling sentence completion test (HSCT), for shifting a task switching paradigm and the trail making test (TMT), and for updating the backward digit span (BDS) task and a n-back paradigm. As all participants performed all tasks, a further aim was to compare the size of the age-related cognitive decline among the four EFs. Age-related decline was observed in all four EFs in one or both of the tasks employed. The results revealed significantly poorer performance in the older adults in the response times (RTs) of the PRP effect, interference score of the Stroop, RT inhibition costs of the HSCT, RT and error-rate shifting costs of the task switching paradigm, and the error-rate updating costs of the n-back paradigm. A comparison between the rates of decline revealed numerical and statistically significant differences between the four EFs, with inhibition showing the greatest decline, followed by shifting, updating, and dual-tasking. Thus, we conclude that with age, these four EFs decline at different rates.

Impact of mindfulness training on in-the-moment attentional control and emotion dysregulation in older adults: secondary analysis of a pilot, placebo-controlled randomized controlled trial

Mindfulness-based interventions show increasing promise for improving attention and emotion regulation- processes that critically support healthy aging. Given their complex, multi-faceted nature, identifying specific aspects of attention and emotion regulation that are modifiable with training in older adults, particularly compared with active control groups, is an ongoing challenge. We performed pre-registered, secondary analyses of a pilot randomized controlled trial comparing the effects of a four-week mindfulness-based attention training (MBAT) group and a lifestyle education (LifeEd) active control group on attention and emotion dysregulation in older adults. Differential training outcomes were assessed for: (a) in-the-moment effects of mind-wandering on sustained attention, measured by performance decrements preceding self-reported mind-wandering, and (b) self-reported emotion dysregulation. Baseline working memory (WM) performance was tested as a moderator of training effects. There were no significant between-group differences for change in in-the-moment effects of mind-wandering on attention or emotion dysregulation. However, baseline WM moderated training effects, such that older adults with higher WM showed greater reductions in emotion dysregulation following mindfulness training. This has potential implications for identifying aging cohorts that may benefit most from this type of training.

Unifying framework for cognitive training interventions in brain aging

Cognitive training is a promising tool for slowing or preventing cognitive decline in older adults at-risk for dementia. Its success, however, has been limited by a lack of evidence showing that it reliably causes broad training effects: improvements in cognition across a range of domains that lead to real-world benefits. Here, we propose a framework for enhancing the effect of cognitive training interventions in brain aging. The focus is on (A) developing cognitive training task paradigms that are informed by population-level cognitive characteristics and pathophysiology, and (B) personalizing how these sets are presented to participants during training via feedback loops that aim to optimize "mismatch" between participant capacity and training demands using both adaptation and random variability. In this way, cognitive training can better alter whole-brain topology in a manner that supports broad training effects in the context of brain aging.

Predicting response time variability from task and resting-state functional connectivity in the aging brain

Aging is associated with declines in a host of cognitive functions, including attentional control, inhibitory control, episodic memory, processing speed, and executive functioning. Theoretical models attribute the age-related decline in cognitive functioning to deficits in goal maintenance and attentional inhibition. Despite these well-documented declines in executive control resources, older adults endorse fewer episodes of mind-wandering when assessed using task-embedded thought probes. Furthermore, previous work on the neural basis of mind-wandering has mostly focused on young adults with studies predominantly focusing on the activity and connectivity of a select few canonical networks. However, whole-brain functional networks associated with mind-wandering in aging have not yet been characterized. In this study, using response time variability-the trial-to-trial fluctuations in behavioral responses-as an indirect marker of mind-wandering or an "out-of-the-zone" attentional state representing suboptimal behavioral performance, we show that brain-based predictive models of response time variability can be derived from whole-brain task functional connectivity. In contrast, models derived from resting-state functional connectivity alone did not predict individual response time variability. Finally, we show that despite successful within-sample prediction of response time variability, our models did not generalize to predict response time variability in independent cohorts of older adults with resting-state connectivity. Overall, our findings provide evidence for the utility of task-based functional connectivity in predicting individual response time variability in aging. Future research is needed to derive more robust and generalizable models.

Clarifying the relationship between trait mindfulness and objective performance

The present study focused on the relationship between trait mindfulness and the outcome component of performance, evaluated with objective indicators. In particular, four objective performance indicators were studied: accuracy, reaction time, variability in reaction times, and detection of unexpected stimuli. Because attention and awareness have been described as core components of mindfulness, and previous research suggests that mindfulness is associated with improved attention skills, this study predicted that trait mindfulness would be positively related to objective indicators of high performance (accuracy, detection of unexpected stimuli) and negatively related to objective indicators of low performance (reaction time, variability in reaction time), on an attention task. Moreover, the study predicted that the relationship between trait mindfulness and objective performance would be modulated by task complexity. University students (139) completed mindfulness, intelligence, and personality questionnaires and completed an adapted Stroop task (Stroop, 1935) in E-prime 2 software. To test our hypotheses, we performed hierarchical multiple regression analyses in SPSS. Our results revealed that trait mindfulness is not related to objective indicators of performance in an attention task, except for the detection of unexpected stimuli. Going further with our analyses, we also confirmed the important role of intelligence in performance outcomes. Finally, task complexity was not playing a moderator role in the relationship between mindfulness and objective performance. Our research contributes to the literature on mindfulness and objective performance, providing empirical evidence for the relationship between trait mindfulness and the detection of unexpected stimuli. Study limitations and avenues for future research are discussed.

Social Robots for Evaluating Attention State in Older Adults

Sustained attention is essential for older adults to maintain an active lifestyle, and the deficiency of this function is often associated with health-related risks such as falling and frailty. The present study examined whether the well-established age-effect on reducing mind-wandering, the drift to internal thoughts that are seen to be detrimental to attentional control, could be replicated by using a robotic experimenter for older adults who are not as familiar with online technologies. A total of 28 younger and 22 older adults performed a Sustained Attention to Response Task (SART) by answering thought probes regarding their attention states and providing confidence ratings for their own task performances. The indices from the modified SART suggested a well-documented conservative response strategy endorsed by older adults, which were represented by slower responses and increased omission errors. Moreover, the slower responses and increased omissions were found to be associated with less self-reported mind-wandering, thus showing consistency with their higher subjective ratings of attentional control. Overall, this study demonstrates the potential of constructing age-related cognitive profiles with attention evaluation instruction based on a social companion robot for older adults at home.

Age-related changes in ongoing thought relate to external context and individual cognition

Understanding how age-related changes in cognition manifest in the real world is an important goal. One means of capturing these changes involves "experience sampling" participant's self-reported thoughts. Research has shown age-related changes in ongoing thought: e.g., older adults have fewer thoughts unrelated to the here-and-now. However, it is currently unclear how these changes reflect cognitive aging or lifestyle changes. 78 younger adults and 35 older adults rated their thought contents along 20 dimensions and the difficulty of their current activity in their daily lives. They also performed cognitive tasks in the laboratory. In a set of exploratory analyses, we found that older adults spent more time thinking positive, wanted thoughts, particularly in demanding contexts, and less time mind wandering about their future selves. Past-related thought related to episodic memory differently in older and younger adults. These findings inform the use of experience sampling to understand cognitive aging.

Mindfulness Meditation: Impact on Attentional Control and Emotion Dysregulation

OBJECTIVE

Theoretical models of mindfulness meditation conceptualize the cultivation of focused attention and regulation of emotional states, with the attitudinal foundations that promote nonjudgment and acceptance, to facilitate cognitive and affective processing resulting in improved brain health. Within the scientific study of mindfulness meditation, outcomes assessing behavioral and neural correlates of attentional control and emotion regulation have been examined for their malleability as a function of engagement in mindfulness practices. This review synthesizes the results of our pilot trials examining the preliminary effects of mindfulness meditation on metrics of cognitive, affective, and brain health in older adults and in individuals with multiple sclerosis.

CONCLUSIONS

There is promising support for mindfulness meditation to enhance attentional control, reduce mind-wandering, and reduce emotion dysregulation. However, well-powered efficacy trials, with an objective assessment of mindfulness practice data are needed to further provide causal and comprehensive evidence supporting the efficacy of mindfulness meditation for brain health. Inclusion of independently derived and validated brain-based signatures of cognitive and affective functioning can additionally enable a parsimonious understanding of how mindfulness meditation can causally impact metrics of functional and structural integrity of the human brain.

Older and more mindful? Age differences in mindfulness components and well-being

OBJECTIVES

Empirical research on the processes through which mindfulness affects well-being is in its infancy. Furthermore, few studies have considered the positive effects of mindfulness on psychological functioning from a lifespan perspective. The present study aimed to examine the role of age in moderating associations of mindfulness components with well-being in the context of a proposed model of mindfulness.

METHODS

A community-based sample of 623 participants aged between 18 and 86 years (M = 48.78, SD = 16.74) was recruited via an internet-based research platform. Participants completed questionnaire measures of mindful characteristics (i.e. present-moment attention, nonjudgment, interoception, acceptance, nonattachment, and decentering), flexible goal adjustment, and well-being.

RESULTS

Parallel mediation analyses showed that both present-moment attention and nonjudgment provided significant pathways to (a) flexible goal adjustment through nonattachment and decentering; and (b) well-being through acceptance, nonattachment, and decentering. Furthermore, present-moment attention, nonjudgment, acceptance, nonattachment, and decentering were all positively associated with age. Conditional process analyses revealed that the direct relationships between (1) present-moment attention and well-being, (2) nonjudgment and well-being, and (3) decentering and flexible goal adjustment became stronger with age and were significant for adults from around 40 years of age and older.

CONCLUSIONS

The findings suggest that the tendency to focus on the present-moment and adopt a nonjudgmental orientation may become especially important for well-being with advancing age, and the ability to appreciate the transitory nature of personal experiences may be particularly important for flexible employment of both goal disengagement and reengagement strategies across the second half of life.

Validity Evidence of the Spanish Version of the Mindful Attention Awareness Scale Using the Rasch Measurement Model

The Mindful Attention Awareness Scale (MAAS) is the most cited instrument to measure dispositional mindfulness. However, some aspects of its validity are still under debate. We aimed to assess different sources of validity evidence (i.e., response processes, content, internal structure, reliability, and relations with external variables) of the MAAS scores in a sample of Spanish-speaking participants (N = 812) applying Rasch modeling. The items formed an essentially unidimensional structure, the item hierarchy was similar to that of previous comparable studies, the items were well targeted, and the ordering of persons along the construct was adequate. Moreover, measures were invariant across four age groups and three groups based on meditation practice, and correlated as expected with a variety of well-being variables. In sum, our findings supported the interpretation of MAAS scores as a measure of mindfulness in our sample of Spanish-speaking participants. Any other specific inference should be tested.

Age differences in sustained attention tasks: A meta-analysis

Many aspects of attention decline with aging. There is a current debate on how aging also affects sustained attention. In this study, we contribute to this debate by meta-analytically comparing performance on the go/no-go Sustained Attention to Response Task (SART) in younger and older adults. We included only studies in which the SART had a low proportion of no-go trials (5%–30%), there was a random or quasirandom stimulus presentation, and data on both healthy younger and older adults were available. A total of 12 studies were suitable with 832 younger adults and 690 older adults. Results showed that older adults were slower than younger adults on go trials (g = 1, 95% CI [.72, 1.27]) and more accurate than younger adults on no-go trials (g = .59, 95% CI [.32, .85]). Moreover, older adults were slower after a no-go error than younger adults (g = .79, 95% CI [.60, .99]). These results are compatible with an age-related processing speed deficit, mostly suggested by longer go RTs, but also with an increased preference for a prudent strategy, as demonstrated by fewer no-go errors and greater posterror slowing in older adults. An inhibitory deficit account could not explain these findings, as older adults actually outperformed younger adults by producing fewer false alarms to no-go stimuli. These findings point to a more prudent strategy when using attentional resources in aging that allows reducing the false-alarm rate in tasks producing a tendency for automatic responding.