Comparison of the effectiveness of metacognitive therapy based on mindfulness and Transcranial direct current stimulation (tDCS) on people with General Anxiety Disorder (GAD).

INTERVENTION: Intervention 1: "Intervention group1", Fifteen sessions of tdcs treatment each session twenty minutes, It is a nerve therapy technique, Direct and weak electrical current flows into the cortical regions and facilitates or inhibits spontaneous neuronal activity. Intervention 2: "Intervention group2": Eight sessions of metacognitive therapy based on mindfulness sessions per hour, Metacognitive therapy deals with the control and interpretation of the thinking process, Treatment involves eliminating worries and disturbing thoughts without avoiding them. Intervention 3: "Control group": Waiting for treatment. CONDITION: General anxiety disorder. ; Generalized anxiety disorder PRIMARY OUTCOME: Cognitive emotional regulation. Timepoint: Before therapy and maximum one week after therapy. Method of measurement: Cognitive emotional regulation scale. Emotional processing. Timepoint: Before therapy and maximum one week after therapy. Method of measurement: Emotional processing questionaire. Experiential avoidance. Timepoint: Before therapy and maximum one week after therapy. Method of measurement: Acceptance and Action Questionnaire. INCLUSION CRITERIA: Catching general anxiety disorder according to DSM5 Not being under any psychotherapy over the past three months, Not having other psychiatric disorders Lack of substance and drug abuse