Personalized Feedback Intervention for Marijuana Use

描述(由申请人提供)：这项研究的广泛、长期目标是通过为一年级大学生开发有效的预防和干预技术，减少在过渡到大学期间使用大麻的流行率和相关危害。吸食大麻是大学生最常使用的违禁药物，高达35%的学生报告在过去一年内吸食过大麻。当前项目的主要目的是记录基于互联网的个性化规范反馈(PNF)干预与仅接受评估的情况相比在预防从未使用过的一年级大学生中开始吸食大麻以及减少使用和目前使用的相关负面后果方面的有效性。第二个目标是评估干预效果的几个潜在调节因素和中介因素(例如，变化的准备程度、精神症状、饮酒情况和人口统计变量)。本研究的具体目标将分三个阶段完成。第一阶段将由一个衡量标准制定部分组成。第二阶段将根据以前用于减少高风险饮酒的方案，开发针对大麻使用的PNF干预措施。第三阶段将采用纵向设计，评估基于互联网的PNF计划对两组新生的效果：不吸食大麻(n=300)和吸食大麻(n=300)，通过对UW大学新生(N=2670)的随机样本进行简短筛选，并根据终身和过去一年的使用情况确定。每组的学生，无论是使用者还是非使用者，将被随机分为干预组或仅进行评估的控制组。在完成基线调查后，干预组的学生将立即接受PNF。所有学生将在基线后3个月、6个月和9个月进行评估。这项研究将填补在利用规范反馈预防和减少大麻使用方面的重要知识空白，并将作为实施基于互联网的低成本个性化规范反馈干预措施的原型。

DESCRIPTION (provided by applicant): The broad, long-term objective of this research is to reduce the prevalence of marijuana use and related harm during the transition to university, through the development of efficacious prevention and intervention techniques for first-year college students. Marijuana use is the most commonly used illicit substance among college students, with up to 35% of students reporting use within the past year. The primary aim of the current project is to document the efficacy of an internet-based personalized normative feedback (PNF) intervention, compared to an assessment-only condition, in preventing marijuana initiation among never using first-year college students and in reducing use and related negative consequences of currently using students. A secondary aim is to evaluate several potential moderators and mediators of intervention efficacy (e.g., readiness to change, psychiatric symptoms, alcohol consumption, and demographic variables). The specific aims of this research will be accomplished in three phases. Phase 1 will consist of a measure development component. Phase 2 will be to develop the PNF intervention for marijuana use adapted from a protocol previously used for reducing high-risk drinking. Phase 3 will employ a longitudinal design to evaluate the efficacy of the internet-based PNF program for two groups of incoming college-freshmen: marijuana nonusers (n=300) and marijuana users (n=300), identified through brief screening of a random sample of UW incoming freshmen (N=2670) and based on lifetime and past-year use. Students in each group, user and non-user, will be randomized into an intervention group or an assessment-only control group. Students in the intervention groups will immediately receive PNF upon completion of the baseline survey. All students will be assessed 3-, 6-and 9-months post-baseline. This research will fill important knowledge gaps regarding the use of normative feedback in preventing and reducing marijuana use and will serve as a prototype for implementing low-cost internet based personalized normative feedback interventions.