Inclusion Criteria:  have a diagnosis of a Post Traumatic Stress Disorder (PTSD spectrum disorder (ICD-10, F43.1, confirmed by SCID-5 and CAPS) have a diagnosis of a schizophrenia spectrum disorder (ICD-10, F2, confirmed by SCID-5) patients will be reporting distressing AH for at least six months (to be beyond the startle and adjustment phase ) and score ≥ 3 on either item 8 or item 9 of the PSYRATS-AH; be ≥ 18 years of age good knowledge of the German language Willingness to participate in randomization and trauma-focused therapy  Exclusion Criteria:  Changes in neuroleptic or antidepressant therapy within the last 4 weeks (exclusion of drug effects) Any substance addiction with continued use other than nicotine and / or caffeine addiction IQ of 70 or less Acute suicidality Pregnant women