Marijuana use among U.S. college students is the highest since the mid-1980s. Because knowledge about marijuana and confidence in the knowledge are related to changing marijuana laws and marijuana-related messages ubiquitous in college students' information environment, we examined their relationships with use. The Structural Equation Modeling…

A prospective online study, consisting of 203 participants ages 18 and older who smoked waterpipe (hookah) within the last 30 days, examined how brief messaging about harms of burning charcoal to heat waterpipe tobacco (shisha) influenced knowledge of toxicants released by using charcoal and perceived harms of using charcoal. Participants were…

A total of 371 university students were asked to estimate the amount of alcohol contained in a standard drink and to estimate the number of standard drinks contained in popular alcoholic beverages. In addition, students completed questionnaires assessing their perception of short and long term harm related to the consumption of beer, wine, spirits…

This preliminary study evaluated effectiveness of a tobacco prevention program on knowledge, attitude, intention, and behavior of tobacco use among fourth-grade students. Results suggest that the program was effective and showed that students in the education group had greater improvement in knowledge than the comparison group. Both students and…