在非静止结果概率的经验决策中测试体征标记假设
1Department of Psychology, University of Essex, Colchester, United Kingdom.
Frontiers in psychology
|August 14, 2023
概括
这项研究发现了Somatic Marker假设的有限证据,表明生理反应不能可靠地指导基于经验的任务的决策. 需要对更大样本进行更多的研究,以了解选择中的体态.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 行为经济学是一种行为经济学.
背景情况:
- 身体标志物假说 (SMH) 提出,生理信号 (身体标志物) 通过将选项标记为好或坏来影响基于经验的决策.
- 这些标记被认为有助于在审议期间区分有利和不利的选择.
研究的目的:
- 在不确定性和变化的概率条件下,研究体态在决策中的作用.
- 测试预期和结果相关的生理反应对选择行为的预测能力.
主要方法:
- 两项基于经验的决策任务共进行了72名参与者,涉及在两个未标记的选项之间进行反复选择,其胜负概率各不相同.
- 皮肤导电性 (SC) 被测量以评估情绪强度,分析重点是选择前 (预期) 和选择后 (结果) SC.
- 评估了参与者在最佳结果发生意外变化后调整选择的能力.
主要成果:
- 参与者通常选择最佳选择,并适应收益变化,尽管在切换后的表现下降.
- 在一项研究中,与结果相关的皮肤导电性在损失比胜利更高,并且当失败的结果是积极的.
- 预测性皮肤导电性不能可靠地预测最佳决策.
结论:
- 在这种情况下,这些发现对体征标记物假设提出的机制提供了有限的支持.
- 该研究强调,需要采用多样化的方法,多样化的任务和大样本大小,以强有力的评估体态对决策的影响.
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