Effects of loss aversion on post-decision wagering: Implications for measures of awareness
Effects of loss aversion on post-decision wagering: Implications for measures of awareness
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DOI：
10.1016/j.concog.2009.11.002
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发表时间：
2010-03-01
影响因子：
2.4
通讯作者：
Dolan, Raymond J.
中科院分区：
文献类型：
--
作者：
Fleming, Stephen M.;Dolan, Raymond J.
根据先前的决定进行投注，或决策后投注，最近被提出来测量意识虽然直观上很吸引人，但仍然不清楚经济背景是否与主观信心相互作用，以及这种相互作用如何影响意识的测量。在这里，我们提出了一个信号检测模型，该模型预测，有利的赌注放置在前面的刺激的身份受到损失厌恶的影响，尽管刺激可见性保持恒定，但这种预测结果的模式在心理物理任务中是明显的，其中我们独立地操纵感知和经济因素。由下注大小的变化引起的下注行为的变化主要由标准的变化驱动，与模型一致。然而，对于接近阈值的刺激，下注效率的降低也是明显的，与所有明显但可能虚幻的刺激意识下降相一致这些发现挑战了一个断言，即决策后赌博提供了主观意识的直接指数（C）2009 Elsevier Inc保留所有权利
Wagering contingent on a previous decision, or post-decision wagering, has recently been proposed to measure Conscious awareness Whilst intuitively appealing, it remains unclear whether economic context interacts with subjective confidence and how such interactions might impact on the measurement of awareness Here we propose a signal detection model which predicts that advantageous wagers placed oil the identity of preceding stimuli are affected by loss aversion, despite stimulus visibility remaining constant This pattern of predicted results was evident in a psychophysical task where we independently manipulated perceptual and economic factors Changes in wagering behaviour induced by changes in wager size were largely driven by changes in criterion, consistent with the model However, for near-threshold stimuli, a reduction in wagering efficiency was also evident, consistent with all apparent but potentially illusory decrease in awareness of the stimulus These findings challenge an assertion that post-decision wagering provides a direct index of subjective awareness (C) 2009 Elsevier Inc All rights reserved