Abstract: Preferences reverse between near choice and distant choice is normal in intertemporal choice. Affection, tine perception and varying decision weighting are three hypothesizes explaining preferences reverse in intertemporal choice. This study tests these hypothesizes by scaling affection strength, perceived time length, and decision weighting in decision making directly. The results indicate: (1) SS activates stronger affection in proximal choice but not in distant choice; (2) affection strength can predict proximal choice but not distant choice; (3) the difference of the strength of impulsive affection and length of time perception between proximal choice and distant choice can predict preferences reverses. The results support affection and time perception hypothesizes.

Key words: intertemporal choice, time discounting, preference reversals

摘要： 通过直接测量近期和远期选择中备选项激活的情绪、间隔的时间知觉及对备选项金额差异和时间间隔的重视程度，以探究跨期选择中偏好反转产生的心理机制。结果表明：（1）近期选择中，备选项激活的情绪强度差异显著，而远期选择中两者的差异不显著；（2）近期和远期选择中，情绪强度差异和时间知觉差异能够预测偏好反转的发生。研究结果支持了偏好反转的情绪激活差异假说和时间知觉差异假说。

关键词: 跨期选择, 时间折扣, 偏好反转