Childhood maltreatment is usually measured with the Childhood Trauma Questionnaire (CTQ). However, as far as I know, the CTQ is not in the public domain. Moreover, I may need to make some modifications (e.g. language adaptations, using only some of the original subscales, etc.), which could complicate things with the publisher. Are you aware of a free/open (as well as psychometrically sound) alternative that I could use as a retrospective measure of child abuse in adults?