Nonjudgment Mediates the Effect of a Brief Smartphone-Delivered Mindfulness Intervention on Rumination in a Randomized Controlled Trial with Adolescents

Rumination, a risk factor for the development of psychopathology that often emerges during adolescence, has been successfully targeted in mindfulness interventions; however, the mechanism is unclear. Acquiring mindfulness skills may help reduce repetitive ruminative thinking and in turn alleviate negative emotions. The goal of the present study was to test whether changes in trait mindfulness accounted for the reductions in rumination following a brief mindfulness intervention. Ruminative adolescents (n = 152; 59