CHANGE IN DELAY DISCOUNTING AND SUBSTANCE REWARD VALUE FOLLOWING A BRIEF ALCOHOL AND DRUG USE INTERVENTION
CHANGE IN DELAY DISCOUNTING AND SUBSTANCE REWARD VALUE FOLLOWING A BRIEF ALCOHOL AND DRUG USE INTERVENTION
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DOI：
10.1002/jeab.121
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发表时间：
2015-01-01
影响因子：
2.7
通讯作者：
Murphy, James G.
中科院分区：
文献类型：
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作者：
Dennhardt, Ashley A.;Yurasek, Ali M.;Murphy, James G.
本研究研究了（1）短暂的物质使用干预对延迟贴现和物质奖励值（RV）指数的影响，以及（2）这些行为经济变量的基线值和治疗后变化是否可以预测物质使用结果。参与者是 97 名酗酒的大学生（58.8% 女性，41.2% 男性），他们完成了简短的动机干预 (BMI)，然后随机接受以下两种条件之一：补充行为经济干预，试图增加与延迟奖励相关的无物质活动的参与度 (SFAS) 或教育控制 (EDU)。治疗后需求强度和Omax下降，弹性显着增加，但对病情没有影响。基线值和 RV 变化（但不打折）预测 6 个月随访时的物质使用结果。 RV 高且吸食大麻的学生在 SFAS 干预后更有可能减少吸食。这些结果表明，短暂的干预可能会降低物质奖励价值，并且奖励价值的变化与随后饮酒和吸毒的减少有关。高 RV 大麻使用者可能会受益于增强未来时间定向和无物质活动参与的干预措施。
The present study examined (1) the impact of a brief substance use intervention on delay discounting and indices of substance reward value (RV), and (2) whether baseline values and posttreatment change in these behavioral economic variables predict substance use outcomes. Participants were 97 heavy drinking college students (58.8% female, 41.2% male) who completed a brief motivational intervention (BMI) and then were randomized to one of two conditions: a supplemental behavioral economic intervention that attempted to increase engagement in substance-free activities associated with delayed rewards (SFAS) or an Education control (EDU). Demand intensity, and Omax, decreased and elasticity significantly increased after treatment, but there was no effect for condition. Both baseline values and change in RV, but not discounting, predicted substance use outcomes at 6-month follow-up. Students with high RV who used marijuana were more likely to reduce their use after the SFAS intervention. These results suggest that brief interventions may reduce substance reward value, and that changes in reward value are associated with subsequent drinking and drug use reductions. High RV marijuana users may benefit from intervention elements that enhance future time orientation and substance-free activity participation.