The ABCX Model of Family Stress is a framework of the family's experience of and reactions to a stressor event. In the model, A represents a stressor event that provokes change in the family system. B is the family's resources and personal strengths. C is the family's perception of the importance and impact of the event. Both B and C influence the family's response to the stressor event. X represents a crisis, in which family processes are immobilized as a result of the stressor event.