Patients with psychotic disorders reported more childhood trauma than their siblings, who in turn reported more trauma than unrelated healthy subjects. Heins et al. (CME, p. 1286) nevertheless found that emotional, physical, or general childhood abuse was related to adult occurrence of positive psychotic symptoms, such as hallucinations, in all three groups. Childhood emotional or physical neglect was largely unrelated to symptoms. The relationship between abuse and positive symptoms followed a dose-response pattern, with higher rates of childhood abuse in participants with higher levels of positive symptoms.