Department of Psychology, University of California, Los Angeles, United States.
Department of Psychiatry, University of California, San Diego, United States.
Drug Alcohol Depend. 2018 Jun 1;187:1-7. doi: 10.1016/j.drugalcdep.2018.01.034. Epub 2018 Mar 27.
Abuse of psychostimulants, including methamphetamine (MA), has been linked to heightened impulsivity. While previous research has demonstrated differences in impulsivity between MA users and non-substance users, less is known about variability in impulsivity within MA users and whether the severity of MA use related problems predicts impulsivity within individuals who regularly use MA. This study aims to elucidate the relationship between impulsivity and MA use severity.
Non-treatment seeking individuals who reported regular MA use (n = 177) completed an impulsivity battery comprising self-report and behavioral measures. A structural equation modeling (SEM) approach was used to test the relationship between the MA use related problem severity and measures of impulsivity.
The final SEM model of impulsivity and MA use related problems (CFI = 0.897, RMSEA = 0.059, S-B scaled χ [260,n = 103] = 406.86) revealed that greater MA use severity was associated with greater self-reported impulsiveness, but no relationship was found between MA use severity and behavioral measures of impulsivity.
The current findings extend previous research by providing additional evidence that MA use is associated with increased self-reported impulsivity and highlights the importance of evaluating impulsivity as a multidimensional construct.
包括甲基苯丙胺（MA）在内的精神兴奋剂滥用与冲动性增强有关。虽然之前的研究已经证明了 MA 用户和非物质使用者之间在冲动性方面的差异，但对于 MA 用户内部冲动性的可变性以及 MA 使用相关问题的严重程度是否能预测经常使用 MA 的个体的冲动性知之甚少。本研究旨在阐明冲动性与 MA 使用严重程度之间的关系。
报告有规律 MA 使用的非治疗性寻求者（n=177）完成了一个冲动性测试，其中包括自我报告和行为测量。结构方程模型（SEM）方法用于测试 MA 使用相关问题严重程度与冲动性测量之间的关系。
冲动性和 MA 使用相关问题的最终 SEM 模型（CFI=0.897，RMSEA=0.059，S-B 标准化 χ[260，n=103]=406.86）表明，MA 使用严重程度与更高的自我报告冲动性有关，但 MA 使用严重程度与冲动性的行为测量之间没有关系。
本研究结果通过提供更多证据表明 MA 使用与增加的自我报告冲动性有关，扩展了之前的研究，突出了评估冲动性作为多维结构的重要性。
