Foxx Ricarda K, Taylor Hailey, Castro Michelle, Smith Aaron P, Yurasek Ali M, Yi Richard
Department of Health Education & Behavior, University of Florida, Gainesville, Florida.
Center for Addiction Research and Education, University of Florida, Gainesville, Florida.
J Stud Alcohol Drugs. 2023 Jan;84(1):58-66. doi: 10.15288/jsad.21-00321.
Despite extensive literature that has identified high rates of delay discounting as a behavioral correlate of substance misuse, associations of cannabis use measures and delay discounting are less consistent. Furthermore, there is very limited research examining cannabis use using cross-commodity delay discounting tasks, where the immediate and delayed outcomes are different commodities.
Using conventional single-commodity delay discounting tasks for money and cannabis outcomes as well as cross-commodity delay discounting tasks (i.e., cannabis now vs. money later, money now vs. cannabis later), we examined associations of delay discounting rates with cannabis use frequency, cannabis use disorder symptom count, cannabis-related problems, and craving among young adult cannabis users ( = 115; age = 20.7, = 2.6; cannabis use days per month = 15.5, = 10.0).
Although associations between cannabis use measures and rates of delay discounting in single-commodity conditions were modest, significant associations were observed with delay discounting rates in cross-commodity conditions. Of note, regression and model comparison analyses generally showed positive associations of cannabis measures with immediate cannabis versus delayed money delay discounting rates, and negative associations of cannabis measures with immediate money versus delayed cannabis delay discounting rates.
The results suggest that problematic cannabis use may not be strictly associated with the inability to wait for delayed outcomes, as suggested by previous research implementing single-commodity delay discounting tasks, but also with a willingness to wait for delayed access to cannabis.
尽管有大量文献表明高延迟折扣率是物质滥用的行为相关因素，但大麻使用量度与延迟折扣之间的关联却不太一致。此外，使用跨商品延迟折扣任务（即即时和延迟结果为不同商品）来研究大麻使用的研究非常有限。
我们使用针对金钱和大麻结果的传统单商品延迟折扣任务以及跨商品延迟折扣任务（即现在的大麻与以后的金钱、现在的金钱与以后的大麻），研究了年轻成年大麻使用者（n = 115；年龄 = 20.7，标准差 = 2.6；每月大麻使用天数 = 15.5，标准差 = 10.0）的延迟折扣率与大麻使用频率、大麻使用障碍症状计数、大麻相关问题及渴望之间的关联。
尽管在单商品条件下大麻使用量度与延迟折扣率之间的关联不大，但在跨商品条件下观察到了显著关联。值得注意的是，回归和模型比较分析总体上显示，大麻量度与即时大麻相对于延迟金钱的延迟折扣率呈正相关，与即时金钱相对于延迟大麻的延迟折扣率呈负相关。
结果表明，有问题的大麻使用可能不像先前实施单商品延迟折扣任务的研究所表明的那样，严格与无法等待延迟结果相关，还与愿意等待延迟获取大麻有关。
