Reward magnitude effects on temporal discrimination.
Reward magnitude effects on temporal discrimination.
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DOI：
10.1016/j.lmot.2010.01.002
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发表时间：
2010-05
影响因子：
1.4
通讯作者：
Kirkpatrick K
中科院分区：
文献类型：
--
作者：
Galtress T;Kirkpatrick K
据报道，奖励幅度或价值的变化会对计时行为产生影响，这在某些情况下归因于内部起搏器速度的变化，在其他情况下归因于注意力因素。因此，本实验的目的是澄清奖励的大小对时间过程的影响。在实验1中，训练大鼠区分短（2 s）与长（8 s）信号，然后用中间持续时间进行测试。然后，在不同的组中，短期或长期试验的奖励从1粒增加到4粒。实验2测量了在整个训练过程中与短信号和长信号相关的不同奖励幅度的影响。最后，实验3控制饱腹感的影响，在奖励幅度操纵阶段。在所有三个实验中，心理物理功能的一般平坦化是明显的，这表明不平等的奖励幅度可能会扰乱注意力的持续时间。
Changes in reward magnitude or value have been reported to produce effects on timing behavior, which have been attributed to changes in the speed of an internal pacemaker in some instances and to attentional factors in other cases. The present experiments therefore aimed to clarify the effects of reward magnitude on timing processes. In Experiment 1, rats were trained to discriminate a short (2 s) vs. a long (8 s) signal followed by testing with intermediate durations. Then, the reward on short or long trials was increased from 1 to 4 pellets in separate groups. Experiment 2 measured the effect of different reward magnitudes associated with the short vs. long signals throughout training. Finally, Experiment 3 controlled for satiety effects during the reward magnitude manipulation phase. A general flattening of the psychophysical function was evident in all three experiments, suggesting that unequal reward magnitudes may disrupt attention to duration.