Guan Shuchen, Cheng Lu, Fan Ying, Li Xianchun
Key Laboratory of Brain Functional Genomics, Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Psychology and Cognitive Science, East China Normal University , Shanghai, China.
Front Psychol. 2015 Apr 17;6:468. doi: 10.3389/fpsyg.2015.00468. eCollection 2015.
Previous studies have obtained inconsistent findings about emotional influence on inter-temporal choice (IC). In the present study, we first examined the effect of temporary emotional priming induced by affective pictures in a trial-to-trial paradigm on IC. The results showed that negative priming resulted in much higher percentages of trials during which smaller-but-sooner reward (SS%) were chosen compared with positive and neutral priming. Next, we attempted to explore the possible mechanisms underlying such emotional effects. When participants performed a time reproduction task, mean reaction times in negative priming condition were significantly shorter than those in the other two emotional contexts, which indicated that negative emotional priming led to overestimation of time. Moreover, such overestimation was negatively correlated with performance in the IC task. In contrast, temporary changes of emotional contexts did not alter performances in a Go/NoGo task (including commission errors and omission errors). In sum, our present findings suggested that myopic decisions under negative emotions were associated with altered time perception but not response inhibition.
先前的研究在情绪对跨期选择（IC）的影响方面得出了不一致的结果。在本研究中，我们首先在逐次试验范式中考察了由情感图片诱发的临时情绪启动对IC的影响。结果表明，与积极和中性启动相比，消极启动导致选择较小但较早奖励（SS%）的试验比例要高得多。接下来，我们试图探究这种情绪效应背后的可能机制。当参与者执行时间再现任务时，消极启动条件下的平均反应时间显著短于其他两种情绪情境下的反应时间，这表明消极情绪启动导致对时间的高估。此外，这种高估与IC任务中的表现呈负相关。相比之下，情绪情境的临时变化并未改变Go/NoGo任务中的表现（包括错误肯定和错误否定）。总之，我们目前的研究结果表明，消极情绪下的短视决策与时间感知的改变有关，而与反应抑制无关。
