During an intervention, a group of people get together to present a united front to a person who is struggling with substance abuse issues. The effort is to convince the individual to seek professional treatment for their issues, thus making a positive change in their life. Typically, the group of people staging an intervention will include family, friends, and loved ones of the individual. Sometimes even colleagues may be involved as well. Prior to confronting the individual, the group will prepare what they intend to say and do, planning for any potential reaction – be it positive or negative – from the individual. Members of the group will write letters or lists to share with the individual about how their drinking and/or drug abuse is having a negative affect on the individual as well as their loved ones. They will present the individual with the choice of going to rehab and the consequences that will occur if the individual refuses. Groups will often plan an intervention in a manner that will catch their loved on off guard and in a vulnerable position in the hopes that this will allow for more honest and transparent communication.