Department of Psychology, University of Warwick.
Warwick Business School, University of Warwick.
J Exp Psychol Learn Mem Cogn. 2019 Jun;45(6):957-968. doi: 10.1037/xlm0000629. Epub 2018 Oct 25.
The assumption that losses loom larger than gains is widely used to explain many behavioral phenomena in judgment and decision-making. It is also generally accepted that loss aversion is a stable, traitlike individual difference characterizing people's sensitivity to gains and losses. This interpretation was recently challenged by Walasek and Stewart (2015), who showed that by manipulating the range of the gains and losses used in the accept-reject task it is possible to find loss aversion, loss neutrality, and a reversal of loss aversion. Here, we reexamined the claim that these context effects arise as a result of people being sensitive to the rank position of a given gain among other gains and the rank position of a loss among other losses. We used skewed distributions of outcomes to manipulate the rank position of gains and losses while keeping the range of possible outcomes constant. We found a small but robust effect of skew on the propensity to accept mixed gambles. We compared the sizes of skew and range effects and found that they are of similar magnitude but that the range effects are smaller than those reported by Walasek and Stewart. We were able to attenuate loss aversion, but we were not able to replicate Walasek and Stewart's reversal of loss aversion. We conclude that rank effects are, at least in part, responsible for the loss aversion seen in the accept-reject task. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
损失比收益更明显的假设被广泛用于解释判断和决策中的许多行为现象。人们普遍认为,损失规避是一种稳定的、个体差异的特征,它描述了人们对收益和损失的敏感程度。这种解释最近受到了 Walasek 和 Stewart(2015)的挑战,他们表明,通过操纵接受-拒绝任务中使用的收益和损失的范围,可以发现损失规避、损失中立和损失规避的逆转。在这里,我们重新检验了这样一种观点,即这些上下文效应是由于人们对给定收益在其他收益中的排名位置以及损失在其他损失中的排名位置敏感而产生的。我们使用偏态分布的结果来操纵收益和损失的排名位置,同时保持可能结果的范围不变。我们发现,偏态对混合赌博接受倾向有一个小但稳健的影响。我们比较了偏度和范围效应的大小,发现它们的大小相似,但范围效应比 Walasek 和 Stewart 报告的要小。我们能够减轻损失规避,但我们无法复制 Walasek 和 Stewart 的损失规避逆转。我们的结论是,等级效应至少在一定程度上是接受-拒绝任务中所见的损失规避的原因。(PsycINFO 数据库记录(c)2019 APA,保留所有权利)。