Department of Health Education and Behavior, University of Florida.
Department of Behavioral and Social Sciences, Center for Alcohol and Addiction Studies, Brown University School of Public Health.
Exp Clin Psychopharmacol. 2023 Apr;31(2):318-323. doi: 10.1037/pha0000589. Epub 2022 Sep 8.
Hypothetical purchase tasks assess substance demand, but the length of purchase tasks makes repeated assessment of state-dependent changes in demand difficult, often limiting clinical utility. Although brief assessments of alcohol and cigarette demand exist, brief measures of cannabis demand do not. College students ( = 209, = 19.92, = 1.45; 63% female; 56.9% non-Hispanic Caucasian) who reported using cannabis at least 3 days in the past month, completed an online survey including the full-length marijuana purchase task (MPT), a three-item brief assessment of marijuana demand (BAMD) assessing intensity, and breakpoint, and cannabis use outcomes. Convergent and divergent validity were examined. Independent samples tests compared demand on the BAMD and MPT based on presence or absence of cannabis use disorder (CUD) symptoms, and one-way between-subject analyses of variance compared effects of CUD severity (mild/moderate/severe) on BAMD indices. All indices were significantly correlated across both assessment measures (s < .01). Similarly, all indices on both demand measures were significantly correlated with craving, CUD severity, and cannabis-related consequences (s < .01); whereas only intensity and were significantly correlated with cannabis use frequency (ps < .01). Individuals with (vs. without) CUD symptoms reported significantly greater intensity and (s < .01) and significant differences in CUD severity on BAMD indices were found as well (s < .05). The BAMD demonstrated convergent and divergent validity with the MPT. Findings suggest that brief cannabis demand can be easily assessed as an indicator for high-risk cannabis use. Thus, the BAMD may be a useful and clinically relevant tool to assess cannabis demand in real-world settings. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
假设性购买任务评估物质需求，但购买任务的长度使得对需求的状态依赖性变化进行重复评估变得困难，通常限制了其临床实用性。虽然存在简短的酒精和香烟需求评估方法，但没有简短的大麻需求评估方法。报告过去一个月至少使用大麻 3 天的大学生（n=209，M=19.92，SD=1.45；63%为女性；56.9%为非西班牙裔白种人），完成了一项在线调查，其中包括完整的大麻购买任务（MPT）、评估强度和 的三个项目的大麻需求简短评估（BAMD）以及大麻使用结果。考察了收敛和发散效度。基于是否存在大麻使用障碍（CUD）症状，独立样本 t 检验比较了 BAMD 和 MPT 上的需求，基于 CUD 严重程度（轻度/中度/重度）的单向组间方差分析比较了 BAMD 指数的影响。两种评估方法的所有指数都显著相关（s<.01）。同样，两种需求测量的所有指数都与渴望、CUD 严重程度和与大麻相关的后果显著相关（s<.01）；而只有强度和 与大麻使用频率显著相关（ps<.01）。有（无）CUD 症状的个体报告的强度和 显著更高（s<.01），BAMD 指数上的 CUD 严重程度差异也显著（s<.05）。BAMD 与 MPT 具有收敛和发散效度。研究结果表明，简单的大麻需求评估可以作为高危大麻使用的指标。因此，BAMD 可能是评估现实环境中大麻需求的有用且具有临床相关性的工具。
