The PAS-ADD Checklist is a 25-item questionnaire, written in everyday language, designed for use primarily by care staff and families the people with first-hand knowledge about any changes in the behaviour of the people they care for. The Checklist aims to help staff and carers decide whether further assessment of an individual s mental health may be helpful. It can be used to screen whole groups of individuals, or as part of a regular monitoring of people who are considered to be at risk of mental illness. It is designed to record the presence of a range of problems, all of which may be part of a psychiatric condition. The scoring system includes threshold scores which, if exceeded, indicate the presence of a potential psychiatric problem, which may then be more fully assessed using the Mini PAS-ADD.