Personalized Feedback Intervention for Marijuana Use

描述（由申请人提供）：这项研究的广泛，长期目标是通过为大学一年级学生开发有效的预防和干预技术，减少在向大学过渡期间大麻使用的流行率和相关危害。 大麻使用是大学生中最常用的非法物质，在过去一年中，多达35%的学生报告使用大麻。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）干预的有效性，与仅评估的条件相比，在预防从未使用过的一年级大学生中开始使用大麻，并减少目前使用学生的使用和相关负面后果。第二个目的是评估干预效果的几个潜在调节剂和介质（例如，准备改变，精神症状，酒精消费和人口统计学变量）。本研究的具体目标将分三个阶段实现。第一阶段将包括一个措施制定部分。第二阶段将开发PNF干预大麻的使用改编自以前用于减少高风险饮酒的协议。第3阶段将采用纵向设计来评估两组大学新生的基于互联网的PNF计划的有效性：大麻非使用者（n=300）和大麻使用者（n=300），通过对UW新生（N=2670）的随机样本进行简单筛选，并基于一生和过去一年的使用情况。每组的学生，用户和非用户，将被随机分为干预组或仅评估的对照组。干预组的学生在完成基线调查后将立即接受PNF。所有学生将在基线后3个月、6个月和9个月进行评估。这项研究将填补有关使用规范性反馈预防和减少大麻使用的重要知识空白，并将作为实施低成本基于互联网的个性化规范性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.