风险和延时(即跨期)是人类决策的两大影响因素。以往的研究一般只关注其中的一个因素，且止步于表面的行为效应，却对造成这些效应的心理机制缺乏深入探讨。本项目申请人已经对纯风险决策，纯跨期决策以及风险跨期决策开展了大量研究，并且将动态心理模型引入跨期决策研究。此外，申请人还在近期独立提出了一种全新的建构动态决策模型的理论框架。同以往的动态心理模型相比，基于这一理论框架的模型能够更好地解释跨期决策的实证数据。本项目拟在申请人以往研究的基础上，通过将心理学实验和动态心理建模相结合的方式，进一步探讨在收益和损失两种情境下，以各种不同形式（选择、匹配和评估）进行的纯风险决策，纯跨期决策以及风险跨期决策的动态心理机制。通过全面深入地考察各种不同条件下的人类决策的心理机制，本项目可以为理解和预测日常生活中人们的各种决策提供理论基础，并且为改善人们的决策质量提供实践指导。

Risk and delay (i.e., intertemporal) are two major factors that influence human decision-making. Previous research usually focused on only one of the factors and stopped at superficial behavioral effects without digging into the psychological mechanisms underlying such effects. The applicant has studied pure risky decision, pure intertemporal decision, and risky intertemporal decision intensively, and introduced dynamic psychological models into the research area of intertemporal decision. Recently, the applicant has also independently proposed a brand-new theoretical framework for developing dynamic decision models. Compared with previous dynamic psychological models of intertemporal decision, models built on the new framework perform even better in explaining the empirical data. The aim of this project is to further examine the dynamic psychological mechanisms underlying different forms (i.e., choice, matching, and evaluation) of pure risky decision, pure intertemporal decision, and risky intertemporal decision in both the gain and loss domains using both psychological experiments and dynamic psychological modeling. Through this thorough exploration of the psychological mechanisms underlying human decision-making in various conditions, this project has a potential of setting up a theoretical foundation for understanding and predicting how people make everyday decisions as well as providing practical guidance for enhancing the quality of human decision-making.