Introduction: Driving under the influence of cannabis (DUIC) is proven to increase the risk of collisions and is most common among young drivers (ages 16 to 24). However, little is known about the specific determinants of DUIC behavior among youth, which limits the capacity to develop evidence-based prevention and intervention efforts. This study developed and evaluated a youth DUIC questionnaire, which was used to establish the DUIC determinants of young drivers. Method: The questionnaire was based on the theoretical framework of general deterrence and general prevention. Data obtained included: demographics, past cannabis use and DUIC experiences, DUIC intention, experiences riding as a passenger with someone DUIC, knowledge and credibility of the law, attitudes towards DUIC, and social controls. The resulting questionnaire was validated for a sample of 426 young drivers in the province of Ontario, Canada. An ordinal regression was conducted to examine the relationships between questionnaire items and DUIC intention. Results: The questionnaire displayed good construct validity and internal consistency across four out of five domains (KMO and Cronbach α values ≥ 0.70). Of the 426 respondents (52.6% female), 356 (83.6%) reported previous cannabis use, with 296 (69.5%) doing so in the past year, and 142 (33.3%) reporting DUIC. Furthermore, 179 (42%) study participants indicated at least a slight chance of DUIC in the next year. The regression analysis identified six variables predictive of DUIC intention: past DUIC incidence, perceived percent of those convicted that receive the penalty, moral awareness, perceived dangerousness, minor accident risk, and vicarious punishment avoidance. Conclusions: Preventive efforts should emphasize these determinants when designing targeted strategies and interventions. Practical Applications: These efforts should focus on educating the dangers and risk of a vehicle collision, that law enforcement has the capacity to apprehend and appropriately punish individuals DUIC, and that DUIC is wrong and socially unacceptable.

简介：在大麻影响下驾驶 (DUIC) 已被证明会增加碰撞风险，并且在年轻驾驶员（16 至 24 岁）中最为常见。然而，关于青少年 DUIC 行为的具体决定因素知之甚少，这限制了开展循证预防和干预工作的能力。本研究开发并评估了青年 DUIC 问卷，用于确定青年司机的 DUIC 决定因素。方法：问卷基于一般威慑和一般预防的理论框架。获得的数据包括：人口统计、过去的大麻使用和 DUIC 经历、DUIC 意图、作为乘客与 DUIC 一起骑行的经历、法律知识和可信度、对 DUIC 的态度以及社会控制。由此产生的问卷在加拿大安大略省的 426 名年轻司机样本中得到了验证。进行序数回归以检查问卷项目与 DUIC 意图之间的关系。结果：问卷在五个领域中的四个领域显示出良好的结构效度和内部一致性（KMO 和 Cronbach α 值 ≥ 0.70）。在 426 名受访者（52.6% 女性）中，356 人（83.6%）报告了以前使用过大麻，其中 296 人（69.5%）在过去一年中使用过，142 人（33.3%）报告了 DUIC。此外，179 名 (42%) 研究参与者表示，明年至少有轻微的 DUIC 机会。回归分析确定了六个预测 DUIC 意图的变量：过去的 DUIC 发生率、被定罪者接受处罚的感知百分比、道德意识、感知的危险性、轻微事故风险和避免替代惩罚。结论：在设计有针对性的策略和干预措施时，预防工作应强调这些决定因素。实际应用：这些努力应侧重于教育车辆碰撞的危险和风险，执法部门有能力逮捕和适当惩罚个人 DUIC，以及 DUIC 是错误的和社会不可接受的。