Does Early Emotional Responding to Initial Mindfulness Training Impact Intervention Outcomes?

Rigorous study of the prevalence and functions of emotional responding to initial mindfulness training among meditation-naive practitioners or clients is scarce, yet could be important for informing more personalized and effective delivery of mindfulness-based interventions. Accordingly, we modeled the function of emotional responding to initial mindfulness training on key outcomes of a 4-week mindfulness training intervention among N=115 unselected meditation-naive adults from the general community. We found that elevations and deterioration in both negative and positive affect in the week following initial mindfulness training did not predict prospective intervention retention/dropout, nor key intervention outcomes. These tests were statistically powered to detect small to moderate effects. In contrast to this pattern of null prospective effects on intervention outcomes, we found that the greater the degree of early elevation in positive affect, the greater the prospective likelihood of cultivating higher levels of trait mindfulness over the course of the intervention. Findings indicate that elevations in negative affect and deterioration of positive affect, in early phases of mindfulness meditation training, were not linked to an iatrogenic effect of the intervention nor to elevated risk of dropout. Together, the present findings may contribute to the emerging discourse on safety and adverse effects of mindfulness meditation and inform decision-making with respect to the delivery of mindfulness-based interventions to improve well-being and reduce vulnerability in the general community.