The Family Assesment Device (FAD) is an instrument to measure the structural, organizational, and transactional characteristics of families. It is based on the McMaster Model of Family Functioning (MMFF). The full FAD consists of 60 items distributed over 6 dimensions of family functioning:

• affective involvement
• affective responsiveness
• behavioral control
• communication
• problem solving
• roles

plus a 7th scale to measure general femily functioning. In Lifelines, only the 7th general functioning scale was implemented in the 2A Child Questionnaire.