Hu Wei, Lu Yong, Wang Lihong, Zhang John X
Academy of Psychology and Behavior, Tianjin Normal University, Hexi District, Tianjin, China.
Neuroreport. 2013 Jul 10;24(10):544-9. doi: 10.1097/WNR.0b013e3283621329.
The type of representations involved in implicit learning during the response preparation stage of sequence learning was studied using the response-locked lateralized readiness potential (LRP-R) as an index. Participants performed a modified serial reaction time task on an eight-letter sequence; half were informed to look for patterns in the sequence and half were not. The standard sequence was occasionally replaced by one of two deviant sequences and the LRP-R elicited was analyzed. When comparing across three sequence conditions, namely, a perceptual deviant sequence, a motor deviant sequence, and a standard sequence (as control), the onset latency and the mean amplitude of the LRP-R were similar for all three conditions and for both explicit and implicit learners. The perceptual deviant sequence group showed a longer response preparation time than the motor deviant group and the standard sequence group, but the latter two were not significantly different. The perceptual deviant sequence group showed more negative LRP-R amplitude than the other two groups that did not differ from each other. The finding of similar LRP-R profiles between implicit and explicit learners suggests that stimulus representation (S-S association) is the main form of representation supporting sequence learning in the response preparation stage.
以反应锁定的偏侧化准备电位（LRP-R）为指标，研究了序列学习反应准备阶段内隐学习所涉及的表征类型。参与者对一个八字母序列执行了一项修改后的序列反应时任务；一半参与者被告知要寻找序列中的模式，另一半则未被告知。标准序列偶尔会被两个偏差序列之一取代，并对引发的LRP-R进行分析。在比较三种序列条件时，即知觉偏差序列、运动偏差序列和标准序列（作为对照），LRP-R的起始潜伏期和平均幅度在所有三种条件下以及外显学习者和内隐学习者中都是相似的。知觉偏差序列组的反应准备时间比运动偏差组和标准序列组更长，但后两组之间没有显著差异。知觉偏差序列组的LRP-R幅度比其他两组更负，而其他两组之间没有差异。内隐学习者和外显学习者之间LRP-R特征相似的发现表明，刺激表征（S-S关联）是支持反应准备阶段序列学习的主要表征形式。
