Le Jennifer U, Deguzman Regine M, Schmidt Norman B, Short Nicole A
Department of Psychology, University of Nevada, Las Vegas, Las Vegas, Nevada, USA.
Department of Psychology, Florida State University, Tallahassee, Florida, USA.
Br J Clin Psychol. 2025 Sep;64(3):677-691. doi: 10.1111/bjc.12530. Epub 2025 Feb 5.
The Emotional Cascade Model posits that rumination is associated with impulsivity and risky behaviours such as substance use. Although trauma-exposed individuals often engage in rumination and problematic cannabis use, this model has not been tested on trauma-exposed cannabis users. Therefore, our study examines the direct and indirect effects between rumination and its subtypes with problematic cannabis use among trauma-exposed cannabis users. We also examine how these associations occur through impulsivity.
A cross-sectional sample of 56 trauma-exposed young adult cannabis users (M = 21 years, 59% female, 73% white) self-reported rumination, impulsivity, and cannabis-related problems. All participants provided written informed consent, and procedures were approved by the university's Institutional Review Board and pre-registered.
Regression analyses indicated total and brooding rumination were related to greater cannabis-related problems, after covarying for number of traumas and cannabis use frequency. Rumination, specifically brooding, was incrementally associated with greater cannabis-related problems and had an indirect effect on cannabis-related problems through impulsivity. Consistent with hypothesis, rumination and impulsivity were incrementally associated with greater problematic cannabis use among trauma-exposed cannabis users.
The current study expands work on the Emotional Cascade Model by supporting the indirect effect of impulsivity in the association between rumination and problematic cannabis use.
情绪级联模型认为，沉思与冲动性及物质使用等危险行为有关。尽管遭受创伤的个体经常会陷入沉思并存在大麻使用问题，但该模型尚未在遭受创伤的大麻使用者中得到验证。因此，我们的研究考察了沉思及其亚型与遭受创伤的大麻使用者中存在问题的大麻使用之间的直接和间接影响。我们还考察了这些关联是如何通过冲动性产生的。
对56名遭受创伤的年轻成年大麻使用者（平均年龄=21岁，59%为女性，73%为白人）进行横断面抽样，让他们自我报告沉思、冲动性及与大麻相关的问题。所有参与者均提供了书面知情同意书，研究程序获得了大学机构审查委员会的批准并进行了预先注册。
回归分析表明，在对创伤次数和大麻使用频率进行协变量调整后，总体沉思和沉思性沉思与更多的大麻相关问题有关。沉思，特别是沉思性沉思，与更多的大麻相关问题呈递增关联，并通过冲动性对大麻相关问题产生间接影响。与假设一致，在遭受创伤的大麻使用者中，沉思和冲动性与更多存在问题的大麻使用呈递增关联。
本研究通过支持冲动性在沉思与存在问题的大麻使用之间关联中的间接作用，扩展了情绪级联模型的研究。
