Difficulty regulating substance use is a core feature of addiction that can manifest as unplanned use. This study sought to identify internal and situational influences on unplanned marijuana use among youth ages 15 to 24 years (N = 85; 48% female; 27% age <18 years). Additionally, we disentangled person-level associations from within-person day-to-day influences. Ecological momentary assessment methods captured affective (positive: energized, excited, sociable, happy, relaxed; negative: bored, tense, sad, stressed) and situational factors in real-world settings during a 1-week monitoring period. Participants reported no plan to use on 51% of days (269/527), and youth ultimately used marijuana on 35% of these unplanned days. At the day level, on days when youth spent more time in the presence of marijuana-related cues than they typically do, they used more grams on planned days and less on unplanned days. Regardless of use plans, youth were more likely to use on days when they spent more time with using friends and if they reported greater availability of marijuana in general across the monitoring period. At the person level, youth who generally reported higher positive affect, relative to other participants, used more on planned days and less on unplanned days. Regardless of use plans, youth who generally reported greater craving and time in the presence of marijuana-related cues used more grams, whereas youth who generally reported greater negative affect used less. Together, findings revealed several factors, with clear clinical relevance, which may explain why some youth struggle to control their marijuana use. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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他们为什么不停止？了解青少年和青年人计划外使用大麻的情况。

难以调节物质使用是成瘾的核心特征，可以表现为计划外使用。本研究旨在确定对 15 至 24 岁青年（N = 85；48% 女性；27% 年龄 <18 岁）意外使用大麻的内部和情境影响。此外，我们将个人层面的关联与个人内部的日常影响分开。生态瞬时评估方法在为期 1 周的监测期内捕获了现实环境中的情感（积极：充满活力、兴奋、善于交际、快乐、放松；消极：无聊、紧张、悲伤、压力）和情境因素。参与者报告说，有 51% 的天数 (269/527) 没有计划使用大麻，而青少年最终在这些计划外天数中的 35% 使用了大麻。在白天，当年轻人在大麻相关线索面前花费的时间比平时更多时，他们在计划日使用更多克，在计划外使用更少。无论使用计划如何，青少年更有可能在他们花更多时间与朋友一起使用的日子里使用大麻，并且如果他们在整个监测期内报告大麻的总体供应量更大。在人的层面上，相对于其他参与者，通常报告更高积极影响的年轻人在计划的日子里使用得更多，在计划外的日子里用得更少。无论使用计划如何，通常报告在大麻相关线索存在下有更大渴望和时间的青少年使用更多克，而通常报告更大负面影响的青少年使用更少。总之，研究结果揭示了几个具有明确临床相关性的因素，这可以解释为什么一些年轻人难以控制他们的大麻使用。（PsycINFO 数据库记录 (c) 2020 APA，保留所有权利）。