The basis of addiction is controversial. Professionals view it as a disease or a choice. One model is referred to as the Disease model of addiction. The second model is the Choice model of addiction. Researches argue that the addiction process is like the disease model with a target organ being the brain, some type of defect, and symptoms of the disease. The addiction is like the choice model with a disorder of genes, a reward, memory, stress, and choice. Both models result in compulsive behavior.
Cognitive Behavioral Therapy, Dialectal Behavior Therapy and Behaviorism are widely used approaches for addressing Process Addictions and Substance Addictions. Less common approaches are Eclectic, Psychodynamic, Humanistic, and Expressive therapies. Substance addictions relate to drugs, alcohol, and smoking. Process addictions relate to non-substance related behaviors such as gambling, spending, sexual activity, gaming, internet, and food.
Psychologists' oldest definition of addiction is that the addict has a lack of self-control. The addicted party wants to abstain, but they can't resist the temptation. Addicts lose control over their actions. It is viewed that an addict battles with their addiction and wanting abstinence and gain control over their actions.