OBJECTIVE Cannabis is the most used psychoactive substance among adolescents and is a public health concern. Cannabis demand is a quantifiable measure of the reinforcing value of cannabis and comprises two latent-factors-amplitude (maximum consumption) and persistence (sensitivity to increasing costs). Cannabis demand and cannabis motives are important predictors of adolescent cannabis use and associated problems; however, little is known about how these two facets of motivation are causally related. Cannabis motives are thought to represent the final common pathway to cannabis use and may explain why elevated demand is associated with use and consequences. The present study tested whether internal cannabis motives (coping and enjoyment) mediated longitudinal associations between cannabis demand, use (hours high), and negative consequences. METHOD Participants aged 15-18 years old (n = 89, Mage = 17.0, SD = 0.9) who reported lifetime cannabis use completed online assessments of cannabis demand, motives, use and negative consequences at baseline, 3-month, and 6-month follow-up. RESULTS PROCESS mediation models revealed that enjoyment motives mediated the association between amplitude and persistence and use. In addition, coping motives mediated the association between amplitude and negative consequences. CONCLUSIONS These findings suggest that internal motives, while differentially related to aspects of demand and cannabis outcomes, are important in understanding adolescent cannabis use. Prevention efforts aimed at limiting access to cannabis and increasing access to substance-free activities may be important targets for adolescents. Further, cannabis interventions targeting specific motives for using (e.g., to cope with negative affect) may be important for reducing cannabis demand. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

中文翻译：

---

为什么会变高？应对和享受动机调节大麻需求的增加和大麻相关的结果。

目标 大麻是青少年中最常用的精神活性物质，是一个公共健康问题。大麻需求是大麻增强价值的量化指标，由两个潜在因素组成：幅度（最大消费）和持久性（对成本增加的敏感性）。大麻需求和大麻动机是青少年大麻使用和相关问题的重要预测因素；然而，人们对动机的这两个方面如何因果关系知之甚少。大麻动机被认为代表了大麻使用的最终共同途径，并可以解释为什么需求增加与使用和后果相关。本研究测试了大麻的内部动机（应对和享受）是否介导了大麻需求、使用（长时间使用）和负面后果之间的纵向关联。方法 报告终生使用大麻的 15-18 岁参与者（n = 89，Mage = 17.0，SD = 0.9）完成了基线、3 个月和 6 个月大麻需求、动机、使用和负面后果的在线评估跟进。结果过程中介模型显示，享受动机介导了幅度、持久性和使用之间的关联。此外，应对动机介导了幅度和负面后果之间的关联。结论 这些研究结果表明，内部动机虽然与需求和大麻结果方面存在不同的相关性，但对于理解青少年大麻的使用很重要。旨在限制大麻获取和增加无物质活动机会的预防工作可能是青少年的重要目标。此外，针对特定使用动机（例如，应对负面影响）的大麻干预措施对于减少大麻需求可能很重要。（PsycInfo 数据库记录 (c) 2023 APA，保留所有权利）。