The Study of Mindfulness-based Cognitive Therapy and Major Depressive Disorder

The primary objective of the study is to evaluate the clinical curative effect of mindfulness-based cognitive therapy(MBCT) for major depressive disorder(MDD). Moreover, we will also explore the relationship between P300 potential and erroneous negative potential (ERN) variation and clinical symptoms in MDD and MBCT. This study is a randomized-control trial with two study arms: half of patient cases will receive usual medication treatment with the serotonin reuptake inhibitors (SSRIs) and half of patient cases will receive MBCT added to the usual medication treatment. This study is also a case-control trial, there will be matched normal controls compared with patient cases through a range of psychological scales and electroencephalogram.