Exposure to the college setting in and of itself is not suffi cient to cause addiction. Therefore, other vulnerabilities or traits must result in addiction to a variety of substances or behaviors. Alcohol use, smoking, marijuana use, and gambling are the four most common addictive behaviors that have received the most research and prevention attention in the college setting. I explore each and propose that they are expressions of the addiction syndrome.Alcohol use. Alcohol use is very prevalent in the college setting and has been identifi ed as a major public health concern ( Fiore et al., 2000 ; National Institute on Alcohol Abuse and Alcoholism, 2002 ). Large-scale surveys have indicated that approximately 68% of all college students drank alcohol in the past month ( Johnston, O ' Malley, Bachman, & Schulenberg, 2006 ), and 40% of college students engage in heavy episodic drinking, defi ned as drinking fi ve or more drinks for men and four or more for women in one episode in the past 2 weeks ( Wechsler, Davenport, Dowdall, Moeykens, & Castillo, 1994 ). Recent reports have indicated that alcohol use by college students has increased over the past decade ( Hingson, Edwards, Heeren, & Rosenbloom, 2009 ), and recent cross-sectional data evidenced a 16% increase in the proportion of students who engage in frequent heavy episodic drinking (three or more in the past 2 weeks) between 1993( Casais et al., 2007. Heavy episodic drinking is related to numerous alcohol-related consequences, including academic diffi culties, property damage, risky sexual activity, blackouts, alcohol poisoning, and death ( Hingson, Heeren, Zakocs, Kopstein, & Wechsler, 2002 ;Jackson, Sher, & Park, 2005 ;Wechsler & Isaac, 1992 ). A survey of more than 14,000 college students revealed that 31% met the criteria for alcohol abuse and 6% met the criteria for alcohol dependence in the previous 12 months ( Knight et al., 2002 ).Smoking. Approximately 30% of the college student population are current smokers (see Patterson, Lerman, Kaufmann, Neuner, & Audrain-McGovern, 2004 , for a review). Smoking is associated with many negative long-term consequences, such as heart attacks, stroke, and high blood pressure ( Centers for Disease Control and Prevention, 2005 ). This behavior has been linked to being White and living in housing that permits smoking ( Patterson et al., 2004 ). In addition, smoking has been associated with collegiate athletic involvement ( Wechsler, Davenport, Dowdall, Grossman, & Zanakos, 1997 ) as well as membership in the Greek system ( Emmons, Wechsler, Dowdall, & Abraham, 1998 ). Rates of students meeting Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM-IV ; American Psychiatric Association, 1994 ) criteria for nicotine dependence are diffi cult to determine in college students, given the evidence that dependence can manifest itself at different levels of smoking in different age groups (see Dierker et al., 2008 ). In addition, many college students engage in social smoking (smoke only when others are smoking) a...