It is well documented that peer pressure is a major predictor of adolescent substance abuse (Akers 2000, 1985; Aseltine 1995; Becker 1963; Elliott et al 1985; Warr 2005). The current study seeks to bridge the gap between adolescence and young adulthood and provide a more in-depth account of the role peer pressure plays in development and decision making. By looking at a sample of undergraduate college students I have emphasized the social aspect of young adulthood through college attendance which is experienced by many in this age group while at the same time extending the scope of peer pressure strength. The average college student, often referred to as a "traditional student", is entering into young adulthood and experiencing many shifts in routine and expectations. I argue in this study that peer pressure does not cease to exist after adolescence but rather remains strong and provides a conduit sometimes leading to and/or reinforcing negative behaviors, specifically marijuana use.

The data generally provided support for these hypotheses with the exception of the athletic involvement hypotheses. I argue there was not adequate support for these hypotheses because the data gathered did not differentiate between the different types of athletic involvement opportunities present on a typical college campus.