IRCT20211207053315N1 IRCT 2021-12-29 Iran University of Medical Sciences The role of transcranial direct current stimulation on emotional bias, mind-wandering and affect for patients with depression disorder The role of transcranial direct current stimulation on emotional bias, mind-wandering and affect for patients with depression disorder 2021-04-09 anticipated 23 Complete https://irct.ir/trial/60583 interventional Randomization: N/A, Blinding: Single blinded, Placebo: Used, Assignment: Crossover, Purpose: Other, Blinding description: Participants were unaware of the type of stimulus they received. The order of placement of individuals in each stage of the research was done randomly using a lottery. 0 (exploratory trials) Major depression disorder. Intervention 1: Intervention group: Left anode/Right cathode intervention; In this intervention, the positive electrode (anode) is placed on the left dorsolateral prefrontal cortex (DLPFC) , which leads to increased neuronal activity, and the negative electrode (cathode) is placed on the right ventromedial prefrontal cortex (vmPFC). Intervention 2: Intervention group: Left cathode/Right anode intervention; In this intervention, the negative electrode (cathode) is placed on the left dorsolateral prefrontal cortex (DLPFC) , which leads to a decrease in neuronal activity in this area, and the positive electrode (anode) is placed on the right ventromedial prefrontal cortex (vmPFC). Intervention 3: Intervention group: Sham intervention; In this intervention, the anode and cathode electrodes are placed on the subject's head for 15 minutes like a real stimulus, but no electric current enters the subject except for the first 30 seconds of the beginning and the end of the session. This session is considered as control. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information