Increased attention has been given to further understanding non–substance-related patterns of excessive behavior. This attention has been accompanied by debate as to how these phenomena might best be conceptualized. Some categorize excessive behavioral patterns as addictive disorders, whereas others suggest they should be classified as obsessive compulsive spectrum disorders or as impulse control disorders. Reliable classification is important in facilitating communication among researchers, clinicians, and patients as well as providing a framework for developing therapeutic interventions.