Li Rosa, Smith David V, Clithero John A, Venkatraman Vinod, Carter R McKell, Huettel Scott A
Department of Psychology and Neuroscience.
Center for Cognitive Neuroscience.
J Neurosci. 2017 Mar 29;37(13):3588-3598. doi: 10.1523/JNEUROSCI.3486-16.2017. Epub 2017 Mar 6.
In the classic gain/loss framing effect, describing a gamble as a potential gain or loss biases people to make risk-averse or risk-seeking decisions, respectively. The canonical explanation for this effect is that frames differentially modulate emotional processes, which in turn leads to irrational choice behavior. Here, we evaluate the source of framing biases by integrating functional magnetic resonance imaging data from 143 human participants performing a gain/loss framing task with meta-analytic data from >8000 neuroimaging studies. We found that activation during choices consistent with the framing effect were most correlated with activation associated with the resting or default brain, while activation during choices inconsistent with the framing effect was most correlated with the task-engaged brain. Our findings argue against the common interpretation of gain/loss framing as a competition between emotion and control. Instead, our study indicates that this effect results from differential cognitive engagement across decision frames. The biases frequently exhibited by human decision makers have often been attributed to the presence of emotion. Using a large fMRI sample and analysis of whole-brain networks defined with the meta-analytic tool Neurosynth, we find that neural activity during frame-biased decisions was more significantly associated with default behaviors (and the absence of executive control) than with emotion. These findings point to a role for neuroscience in shaping long-standing psychological theories in decision science.
在经典的得失框架效应中,将一场赌博描述为潜在的收益或损失会使人们分别做出规避风险或寻求风险的决策。对此效应的典型解释是,框架会以不同方式调节情绪过程,进而导致非理性的选择行为。在此,我们通过整合143名执行得失框架任务的人类参与者的功能磁共振成像数据与来自8000多项神经成像研究的元分析数据,来评估框架偏差的来源。我们发现,与框架效应一致的选择过程中的激活与静息或默认脑区的激活最为相关,而与框架效应不一致的选择过程中的激活则与参与任务的脑区最为相关。我们的研究结果反对将得失框架效应普遍解释为情绪与控制之间的竞争。相反,我们的研究表明,这种效应是由不同决策框架下认知参与的差异导致的。人类决策者经常表现出的偏差往往被归因于情绪的存在。通过使用大量功能磁共振成像样本,并利用元分析工具Neurosynth定义的全脑网络进行分析,我们发现,在有框架偏差的决策过程中,神经活动与默认行为(以及缺乏执行控制)的关联比与情绪的关联更为显著。这些发现表明神经科学在塑造决策科学中长期存在的心理学理论方面发挥着作用。