Inclusion Criteria:  a Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM IV-TR; American Psychiatric Association (APA), diagnosis of major depressive disorder (MDD) without psychotic features, in Full Remission; three or more prior major depressive episodes; age between 18 and 65 years; cognitive reactivity (CR) or mood-activated dysfunctional beliefs score greater than or equal to eight (see assessment procedure below); a score of less than 10 on the Hamilton Rating Scale for Depression (HRSD); minimum of a 10 week period free of psychotropic medication other than stable dosage of antidepressant medication for a minimum of four weeks; fluency in English; An increased cognitive reactivity score of eight points or more and, ability to give informed consent and complete questionnaires unassisted.  Exclusion Criteria:  a diagnosis of bipolar disorder (past or present), schizophreniform disorders, substance abuse or dependence (current or within the past six months), borderline or antisocial personality disorder, or neurocognitive disorders; current psychotherapy or counselling more frequently than twice per month; current practice of meditation more than once per week or yoga more than twice per week; electroconvulsive therapy within the past six months; or self-reported ingestion of alcohol or other psychoactive substances within the past 48 hrs.