The subjective value of delayed and probabilistic outcomes: Outcome size matters for gains but not for losses.

The subjective value of delayed and probabilistic outcomes: Outcome size matters for gains but not for losses.
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DOI:
10.1016/j.beproc.2009.09.003
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发表时间:
2010-01
影响因子:
1.3
通讯作者:
Wilson, Vanessa B.
Wilson, Vanessa B.
中科院分区:
生物学4区
文献类型:
--
作者:
Mitchell, Suzanne H.;Wilson, Vanessa B.

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报酬(收益)的主观价值与其大小、收到报酬的延迟时间和收到报酬的概率等因素有关。我们调查了128名成年人的损失主观价值是否同样受到这些因素的影响。参与者在直接/确定的收益或损失和较大的延迟/概率收益或损失之间做出选择。100美元的奖励由于延迟(“打折”)相对少于10美元的收益而贬值,而概率100美元的奖励相对大于10美元的奖励被折现。然而,结果大小对延迟或概率损失的贴现没有影响。对于每种规模的延迟结果,收益被贴现的程度与损失被贴现的程度正相关,而对于概率结果,没有观察到这种相关性。这些结果表明,对损失进行主观评估的过程与对收益进行主观评估的过程不同。
The subjective value of a reward (gain) is related to factors such as its size, the delay to its receipt and the probability of its receipt. We examined whether the subjective value of losses was similarly affected by these factors in 128 adults. Participants chose between immediate/certain gains or losses and larger delayed/probabilistic gains or losses. Rewards of $100 were devalued as a function of their delay (“discounted”) relatively less than $10 gains while probabilistic $100 rewards were discounted relatively more than $10 rewards. However, there was no effect of outcome size on discounting of delayed or probabilistic losses. For delayed outcomes of each size, the degree to which gains were discounted was positively correlated with the degree to which losses were discounted, whereas for probabilistic outcomes, no such correlation was observed. These results suggest that the processes underlying the subjective valuation of losses are different from those underlying the subjective valuation of gains.
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