The Posttraumatic Stress Symptoms in Children (PTSS-C) was developed as a cross-cultural semi-structured interview to diagnose posttraumatic stress disorder (PTSD) and to identify PTSD-non-related posttraumatic stress symptoms in children after various traumatic experiences. The psychometric properties were studied in two different child populations in Iraqi Kurdistan (the survivors of the military operation "Anfal", and the orphans), in a sample of Kurdistanian refugee children in Sweden, and in a comparison sample of Swedish children. The instrument yielded satisfactory internal consistency, high interrater agreement, and excellent validity on cross-validation with the Child Posttraumatic Stress Disorder Reaction Index (CPTSD-RI) and the Diagnostic Interview for Children and Adolescents (DICA) according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV).