The present study has several limitations. All data were obtained via self-report, which may be biased due to stigma surrounding substance use. However, the NSDUH utilizes ACASI, which has been shown to increase the likelihood of honest responding for sensitive information (Macalino et al., 2002). The NSDUH cross-sectional design prevented causal inferences regarding the temporal ordering of perceived great risk and correlates. Additionally, the NSDUH did not collect information regarding intention or desire to use cannabis, limiting possible analyses. Nonetheless, a major strength of the present study is the use of a nationally representative sample, allowing for generalization of findings to the U.S. non-institutionalized population ages 12 and older. Additionally, findings provide current estimates of temporal changes in perceived risk of regular cannabis use, as well as correlates of perceived great risk of regular cannabis use.
