According to national statistics, about 10% of divorces involve custody/placement litigation.  Children too often become estranged from one parent during the process.  One explanation of a child’s estrangement from one parent blames the situation on the other parent as an alienator who is responsible for turning a vulnerable child against the other parent.  Parental alienation is sometimes difficult to prove because a child’s alienation from one parent or the other is generally caused by a variety of factors–not just one.  The divorce process itself may have an impact, school change, residence change, etc., also play a role.  Any parental alienation theory needs strong factual support and the reliable testimony of an expert trained in child psychology or related areas.