Value conditioning modulates visual working memory processes.
Value conditioning modulates visual working memory processes.
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DOI：
10.1037/xhp0000144
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发表时间：
2016-01
期刊：
影响因子：
--
通讯作者：
Raymond JE
中科院分区：
文献类型：
--
作者：
Thomas PM;FitzGibbon L;Raymond JE
学习使动机显著事件的价值与预测这些事件的刺激相关联。在这里，我们问的价值协会是否可以促进视觉工作记忆（WM），以及这种影响是否会价依赖。我们的实验是专门设计的，以隔离价值为基础的影响WM的选择性注意，可能会偏向编码的价值为基础的影响。在一个简单的联想学习任务中，参与者学会了将有色面孔的颜色与赚钱或赔钱或两者都不联系起来。有色的脸，然后作为备忘录，在一个脸的身份WM任务，以前学到的颜色协会是无关紧要的，没有货币的结果即将到来。记忆力最好的面孔与增益相关的色调，最差的面孔与损失相关的色调，和平均的面孔与无结果相关的色调。与WM数组中的1项关联的值未调整数组中其他项的内存。研究人脸时的眼球运动并不依赖于先前学习的颜色关联的效价，反对基于价值的偏见是由于差异编码。这种价敏感的价值调节效应WM出现WM维护过程调制的结果。
Learning allows the value of motivationally salient events to become associated with stimuli that predict those events. Here, we asked whether value associations could facilitate visual working memory (WM), and whether such effects would be valence dependent. Our experiment was specifically designed to isolate value-based effects on WM from value-based effects on selective attention that might be expected to bias encoding. In a simple associative learning task, participants learned to associate the color of tinted faces with gaining or losing money or neither. Tinted faces then served as memoranda in a face identity WM task for which previously learned color associations were irrelevant and no monetary outcomes were forthcoming. Memory was best for faces with gain-associated tints, poorest for faces with loss-associated tints, and average for faces with no-outcome-associated tints. Value associated with 1 item in the WM array did not modulate memory for other items in the array. Eye movements when studying faces did not depend on the valence of previously learned color associations, arguing against value-based biases being due to differential encoding. This valence-sensitive value-conditioning effect on WM appears to result from modulation of WM maintenance processes.