A Brief Intervention for PTSD - BWRT

Inclusion Criteria: * Participants must have experienced at least one traumatic experience throughout their lifetime * Participants must meet the DSM-5 criteria for PTSD, or subthreshold PTSD * The following DSM-5 criteria must be fulfilled: * A (exposure to traumatic stressor), * in addition to three out of four of the following symptom-clusters; * B (intrusion), * C (avoidance), * D (negative alterations in cognitions and mood), * E (alterations in arousal and reactivity) * A marked decline in functioning and symptom persistence for over a month Exclusion Criteria: * ongoing psychotic disorders, or a history of psychosis, * severe suicidal ideation, * bipolar disorder, * BMI index too low to benefit from psychological interventions, * severe alcohol or substance dependence, * serious somatic illness or brain damage, * participation in concurrent psychotherapy.