Investigating the Mechanisms of Mindfulness-based Cognitive Therapy (MBCT)

There will be three groups in total. * The first group will take 36 participants in remission from major depression (rMDD) through the 8 week MBCT program. * A control group of 36 rMDD participants will not receive the intervention. * A group of never depressed healthy control participants will also be recruited. Research visits for participants not undergoing MBCT will be separated by an 8 week gap. All participants will be seen before and after the 8 weeks for completion of neuropsychological assessments and questionnaires. rMDD participants will be followed up over the following 12 months to identify any predictors of relapse.