The Dynamic Mechanism of Mindfulness Intervention for Emotional Distress (MIED) Based on Ecological Moment Measurement

The goal of this clinical trial is to examine how a mindfulness-based intervention (MIED) affects the moment-to-moment, lagged relationships between mechanism variables at the levels of feelings, thoughts, and behaviors and outcomes (anxiety and depression) in individuals experiencing anxiety and depressive distress, using high-frequency ecological momentary assessment. The main questions it aims to answer are: At the within-person level, do these mechanism variables significantly predict next-moment anxiety and depressive symptoms at the within-day micro-scale? How does the temporal dynamic between mechanism and outcomes over the course of MIED?

Inclusion Criteria: * Subjects with scores greater than 21 on the Kessler Psychological Distress Scale. Exclusion Criteria: * Subjects who could not access the Internet. * Subjects with insufficient Chinese ability. * Subjects who have participated in mindfulness-based projects for more than 6 weeks before, and / or the current frequency of meditation practice is more than once a week. * Patients with schizophrenia or psychotic affective disorder, current organic mental disorder, substance abuse disorder and generalized developmental disorder. * Subjects at risk of suicide.