Following parental separation or divorce, children’s voices and their legal right to participate are currently insufficiently guaranteed in families, during mediation, and in courts. There is a lack of scientific knowledge on how best to give effect to child participation. This study investigates whether childrens participation in divorce-related decisions increases their sense of autonomy, relatedness, and competence, and thus improves their general functioning. In addition, possible risks of child participation to their adjustment are examined, as well as individual differences in this regard. The research will result in practical guidelines and tools to improve the participation of children around divorce.