The relaxation training is based on the principle of progressive muscle relaxation according to Jacobsen. The patient is asked to tense all muscles in their face and perceive consciously the relaxation afterwards according to verbal cues. In the self-alert training condition, the patient will hear verbal cues to increase their attention. In both conditions the external cues given will be reduced in four phases until the patient has to cue himself. The patient is advised to track the changes in the skin resistance mirrored by biofeedback on a screen.