Within-subject comparison of real and hypothetical money rewards in delay discounting
Within-subject comparison of real and hypothetical money rewards in delay discounting
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DOI：
10.1901/jeab.2002.77-129
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发表时间：
2002-03-01
影响因子：
2.7
通讯作者：
Bickel, WK
中科院分区：
文献类型：
--
作者：
Johnson, MW;Bickel, WK
一项使用人类参与者的受试者内设计，比较了真实的和假设的金钱奖励的延迟折扣函数。研究人员对真实的和假设的奖励进行了研究，研究范围从10美元到250美元不等。对于6名参与者中的5名，在响应真实的和假设的选择时，没有观察到折扣率的系统差异，这表明在延迟折扣研究中，假设的奖励通常可以作为真实的奖励的有效代理。通过测量折扣在一个前所未有的范围内的真实的奖励，这项研究还系统地复制了人类延迟折扣研究的强大发现，折扣率随着奖励的幅度增加而下降。双曲线衰减模型比指数模型更好地描述了数据。
A within-subject design, using human participants, compared delay discounting functions for real and hypothetical money rewards. Both real and hypothetical rewards were studied across a range that included $10 to $250. For 5 of the 6 participants, no systematic difference in discount rate was observed in response to real and hypothetical choices, suggesting that hypothetical rewards may often serve as a valid proxy for real rewards in delay discounting research. By measuring discounting at an unprecedented range of real rewards, this study has also systematically replicated the robust finding in human delay discounting research that discount rates decrease with increasing magnitude of reward. A hyperbolic decay model described the data better than an exponential model.