Disease Model of Addiction Alternative Information - http://www.addictioninfo.org
Cognition is central to drug addiction
http://www.addictioninfo.org/articles/191/1/Cognition-is-central-to-drug-addiction/Page1.html
American Psychological Association
Based in Washington, DC, the American Psychological Association (APA) is a scientific and professional organization that represents psychology in the United States, and is the largest association of psychologists worldwide.
http://www.apa.org/ 
By American Psychological Association
Published on 09/7/2005
 
Recent research shows that drug abuse alters cognitive activities such as decision-making and inhibition, likely setting the stage for addiction and relapse.