Mindfulness-Based Cognitive Therapy (MBCT) for the Prevention of Depression Relapse or Recurrence Using Videoconference

Inclusion Criteria: * Age over 18. * Diagnosis of recurrent major depressive disorder, with ≥ 2 previous major depressive episodes (MDD), either in an acute mild/moderate episode or in remission. * Internet access (via smartphone or personal computer). * Spanish literacy (spoken and written). Exclusion Criteria: * Current severe depressive episode (≥24 on the GRID-HAMD) * Current or past psychosis, bipolar 1 disorder, a history of schizophrenia, schizoaffective disorder, organic mental disorder, current severe substance abuse, organic brain damage, pervasive developmental delay, persistent antisocial behaviour, recent (in the past 6 months) self-injury requiring clinical management or therapy according to medical records and clinical judgment. * Formal concurrent structured psychotherapy during the intervention period. * No experience in the use of new technologies (smartphones or computers). * Having completed a mindfulness-based structured training and/or extensive meditation experience (i.e., previous participation in meditation retreats (≥1) or regular (≥ weekly) meditation practice) in the previous year, or intending to commence meditation retreats or meditation practice during the study.