The aim of the study is the examination of brain plasticity on on affective symptoms after neuromodulation with fMRI (functional magnetic resonance imaging) neurofeedback. During the fMRI neurofeedback training, patients with depression as well as patients with schizophrenia are trained to consciously regulate the activity of areas which are associated with the cognitive reappraisal of emotional stimuli.The aim is to improve the patients' subjective emotional processing and perception in everyday life as well as to investigate the impact of neurofeedback on resting-state networks in the brain. Healthy participants will be investigated as control group.