The 'Pressures to Change' approach to working with the partners of drinkers is a structured procedure for promoting change in resistant drinkers. In this study 22 women and one man were randomly allocated to two treatment conditions and one no-treatment waiting list control condition in an experimental evaluation of the procedure. Group 1 was treated individually and Group 2 was treated as a group. Almost two-thirds of the drinking partners of clients in treatment made a significant move towards change, compared with none of the drinkers in the waiting list control condition.