Mindfulness Training and Attentional Control in Older Adults: A Randomized Controlled Trial

Mindfulness-based interventions have been found to improve facets of attentional control. However, comparison with active control groups has been scarce, and few studies have examined mindfulness as a means to ameliorate age-related cognitive deficits. This rigorously designed randomized controlled trial investigated the effects of mindfulness-based attention training (MBAT) on attentional control in older adults relative to an active control group. Seventy-four community-dwelling older adults were randomized to 4 weeks of MBAT or an active lifestyle education control group. Pre- and post-intervention, participants completed two computerized measures of attentional control with intermittent assessments of self-reported mind-wandering, with metrics of attentional control and mind-wandering being the primary outcome variables for the study. Additionally, participants completed trait and state measures of mindfulness, the positive and negative affect scale, and homework logs to assess intervention-related engagement. Although we found some evidence for greater reductions in mind-wandering in the MBAT than the active control group, the MBAT group did not exhibit greater improvements in attentional performance. Exploratory analyses revealed working memory as a significant moderator of the observed effects, such that those in the MBAT group with higher working memory showed greater improvement in attentional control. We found partial evidence that brief mindfulness training improves mind-wandering, but not attentional control in older adults. Our study provides preliminary support for working memory as an important moderator of short-duration mindfulness training; however, given the exploratory nature of these effects, replication is warranted.