Impulsivity and rapid discounting of delayed hypothetical rewards in cocaine-dependent individuals.
Impulsivity and rapid discounting of delayed hypothetical rewards in cocaine-dependent individuals.
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DOI：
10.1037//1064-1297.11.1.18
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发表时间：
2003-02
影响因子：
2.3
通讯作者：
S. Coffey;G. Gudleski;M. Saladin;K. Brady
中科院分区：
文献类型：
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作者：
S. Coffey;G. Gudleski;M. Saladin;K. Brady
在这项研究中，裂纹/可卡因依赖（CD）和非药物使用匹配对照（MC）的参与者提出了假设的即时和延迟奖励，16延迟条件从5分钟到25年不等。所有参与者都得到了假设的金钱奖励;然而，CD组也得到了假设的快克/可卡因奖励。奖励的客观价值由1美元至1 000美元不等。双曲贴现函数提供了一个很好的拟合数据。CD组对金钱奖励的折扣率高于MC组，CD组对快克/可卡因奖励的折扣率高于金钱奖励。此外，自我报告的措施表明，更大的冲动，在CD组相比，MC组。
In this study, crack/cocaine-dependent (CD) and non-drug-using matched control (MC) participants were presented with hypothetical immediate and delayed rewards, with 16 delay conditions ranging from 5 min to 25 years. All participants were presented with hypothetical monetary rewards; however, the CD group was also presented with hypothetical crack/cocaine rewards. The objective value of the rewards ranged from $1 to $1,000. Hyperbolic discounting functions provided a good fit of the data. The CD group discounted monetary rewards at a higher rate than the MC group did, and the CD group discounted crack/cocaine rewards at a higher rate than it did monetary rewards. Moreover, scores on self-report measures indicated greater impulsivity in the CD group when compared with the MC group.