模糊决策的情境依赖性

实验1采用艾尔斯伯格悖论的研究范式，探究被试对模糊的厌恶倾向以及在决策过程中所采用的决策策略。结果发现：被试对确定选项和模糊选项的选择存在差异；在肯定形式下倾向于确定选项，而在否定形式下则倾向于模糊选项，采用了利益最大化策略。实验2采用艾尔斯伯格悖论的变式，通过操纵概率和任务类型，发现：模糊决策具有情境依赖性，并非任何情况下个体都厌恶模糊。当风险选项不能满足自己的需要，即获胜机率比较小时，人们会偏向模糊选项。

The Ambiguity Decision-making Dependent on the Context

Ambiguity aversion tendency and decision- making strategy were studyed in experiment 1 by using Ellsberg paradox paradigm. The result indicated that there was a significant difference between sure choice and ambiguity choice. Participants tended to make sure choice in positive forms and make ambiguous choice in negative forms by taking the benefit maximization stategy. The variant of Ellsberg paradox was adopted in experiment 2 by changing probability and task types. The results found that ambiguity decision - making was dependent on concrete context.Participants were not always ambiguity aversion. When the need was not satisfied and the win probability was small,participants tended to make ambiguous choice.