U.S. College Students' Marijuana Information Sources, Confidence in Knowledge, and Objective Knowledge

In recent years, marijuana use on U.S. college campuses reached the highest point while the perceptions of risk and social disapproval registered the lowest since the early 1980s. However, little attention has been paid to the sources of the marijuana-related messages and their relationships with marijuana knowledge and confidence in knowledge, proximate protective/risk factors. To fill this gap, a convenience sample of students (N = 249) on a campus located in a U.S. recreational marijuana legal state were surveyed to identify their marijuana information sources and explore the relationships among the sources, confidence in marijuana knowledge, and objective knowledge. Peers/media were the most important sources and they were used more than other sources. Use of peers/media sources was related to lower health knowledge and higher confidence in knowledge. Although students named parents and education/science sources as important, these were less frequently used than siblings, the sources they named as the least important. This study advanced our understanding of the various sources of marijuana information used by U.S. college students and the relationships between the information sources and confidence in knowledge and objective knowledge, two emerging risk/protective factors in the era of marijuana deregulation.