Phillips Kristina T, Phillips Michael M, Lalonde Trent L, Tormohlen Kayla N
School of Psychological Sciences, Campus Box 94, University of Northern Colorado, Greeley, CO 80639, United States.
Applied Statistics and Research Methods, Campus Box 124, University of Northern Colorado, Greeley, CO 80639, United States.
Addict Behav. 2015 Aug;47:42-7. doi: 10.1016/j.addbeh.2015.03.020. Epub 2015 Mar 27.
Marijuana is the most commonly used illicit substance in the U.S., with high rates among young adults in the state of Colorado. Chronic, heavy marijuana use can impact cognitive functioning, which has the potential to influence academic performance of college students. It is possible that craving for marijuana may further contribute to diminished cognitive and affective functioning, thus leading to poor outcomes for students.
College student marijuana users (n=57) were recruited based on heavy use and completed ecological momentary assessment (EMA) via text-messaging. The association between marijuana use and craving in a college setting was explored, as well as how these variables might relate to academic motivation, effort and success. The participants were sent text messages for two weeks, three times per day at random times.
A temporal association between craving and marijuana use was found, where momentary craving positively predicted greater marijuana use. Similarly, as craving levels increased, the number of minutes spent studying decreased at the next assessment point. A negative association between momentary craving for marijuana and academic motivation was found in the same moment. Greater academic self-efficacy positively predicted cumulative GPA, while average minutes spent smoking marijuana was negatively related.
Using EMA, marijuana craving and use were significantly related. These findings provide further evidence that heavy marijuana use is negatively associated with academic outcomes.
大麻是美国最常用的非法物质，在科罗拉多州的年轻人中使用率很高。长期大量使用大麻会影响认知功能，这有可能影响大学生的学业成绩。对大麻的渴望可能会进一步导致认知和情感功能下降，从而给学生带来不良后果。
根据大量使用情况招募了大学生大麻使用者（n = 57），并通过短信完成了生态瞬时评估（EMA）。探讨了在大学环境中大麻使用与渴望之间的关联，以及这些变量如何与学业动机、努力程度和学业成就相关。参与者在两周内每天随机收到三次短信。
发现渴望与大麻使用之间存在时间关联，即瞬时渴望能正向预测更多的大麻使用。同样，随着渴望程度增加，在下一个评估点的学习时间会减少。在同一时刻发现瞬时对大麻的渴望与学业动机之间存在负相关。更高的学业自我效能感能正向预测累积平均绩点，而平均吸食大麻的时间则呈负相关。
使用生态瞬时评估发现，大麻渴望与使用之间存在显著关联。这些发现进一步证明，大量使用大麻与学业成绩呈负相关。
