An intervention is the process of intervening, usually referring to negative behaviors. Additionally, an intervention may refer to a group activity in where the group conducts a surprise, group therapy session for an addicted, or self-harming individual in need of personal, life change. 

When referring to the treatment and therapy of addicted, or self-damaging individuals, the activity of intervention is made up of the struggling person’s family and loved ones. Moreover, these specialized group councils are commonly conducted under the supervision of a therapeutic individual, who assists the individual’s loved ones in effectively reaching the afflicted person. 

While interventions are a useful too, they often do not completely irradiate the negative behaviors of the person of interest. Furthermore, those who are the subject of an intervention, most likely require some sort  of additional, psychiatric treatment.