【摘 要】
：
Sunk cost effect (also called sunk cost fallacy/bias/error/paradox,escalation of commitment,escalating commitment,throwing good money after bad,knee-deep in big muddy,concorde effect/fallacy,etc) is a
【机 构】
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Faculty of Psychology,Southwest University,Chongqing,China
【出 处】
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第一届决策与脑研究国际研讨会(THE 1stINTERNATIONAL SYMPOSIUM ON DECISION MA
论文部分内容阅读
Sunk cost effect (also called sunk cost fallacy/bias/error/paradox,escalation of commitment,escalating commitment,throwing good money after bad,knee-deep in big muddy,concorde effect/fallacy,etc) is a pervasive,interesting and famous decision bias.It refers to the following phenomenon: if one has invested more money,time,effort etc (sunk cost) on something,then he is more likely to make further investment (incremental cost) on it.This phenomenon has been intensively discussed in psychology,economics,management,political science,zoology,etc.To date,little has been known about the neural basis of this phenomenon.We investigated it by using functional magnetic resonance imaging (fMRI) to monitor healthy subjects’ brain activities when they made decisions in a task wherein sunk cost and incremental cost were systematically manipulated.Higher sunk cost only increased activity of some brain areas (mainly lateral frontal and parietal cortices,which are involved in risk-taking),whereas lower incremental cost mainly increased activity of some brain areas (including striatum and medial prefrontal cortex,which are sensitive to rewards).No overlapping brain areas were found to respond to both sunk cost and incremental cost.These results favor certainty effect over self-justification or diminishing sensitivity as account of sunk cost effect.
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