This paper analyzes the way participants change their mind in a deliberative forum. Its contribution lies in studying the extent to which these changes persist over time. We start from Mackie’s assumption that changes of opinion in a deliberative context cannot be interpreted by considering isolated variables, but must be based on individual attitudinal networks in which preferences are embedded. The results show that certain changes after deliberation are not maintained by some individuals. The paper details the importance of certain variables in the change of opinion in the short and long term, as well as the relationship that exists between different attitudes (information,preferences, beliefs and political effi cacy) at three different times before and after deliberation.