Sensitivity to structure in action sequences: An infant event-related potential study
Sensitivity to structure in action sequences: An infant event-related potential study
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DOI：
10.1016/j.neuropsychologia.2017.05.007
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发表时间：
2019-03-18
期刊：
影响因子：
2.6
通讯作者：
Reid，Vincent
中科院分区：
文献类型：
--
作者：
Monroy，Claire D.;Gerson，Sarah A.;Reid，Vincent
婴儿对连续的感觉输入流中的结构和模式很敏感。这种敏感性依赖于统计学习，即在空间和时间序列中检测可预测的干扰的能力。最近的证据表明，婴儿可以在他们观察到的动作序列中发现统计学上的差异，但人们对产生这种能力的神经过程知之甚少。在目前的实验中，我们结合脑电图（EEG）和眼动追踪来识别电生理标记，这些标记表明8 - 11个月大的婴儿是否能检测到违反学习动作序列的行为，并将这些标记与学习过程中预期的行为测量相关联。在学习阶段，婴儿观察一个演员表演一个序列，该序列具有嵌入在随机序列中的两个确定性对。因此，每一对的第一个动作都预示着接下来会发生什么。其中一对造成了动作效应，而第二对则没有。在随后的测试阶段，婴儿观察到另一个序列，其中包括偏离对，违反了先前观察到的行动对。对偏离动作对和原始动作对的事件相关电位（ERP）反应进行了分析和比较。研究结果表明，婴儿表现出更大的负性中央（Nc）ERP反应的偏差行动对造成的行动效果，这是一致的，他们的视觉预期在学习阶段。研究结果进行了讨论的神经和行为过程的感知和学习结构化的动作序列。
Infants are sensitive to structure and patterns within continuous streams of sensory input. This sensitivity relies on statistical learning, the ability to detect predictable regularities in spatial and temporal sequences. Recent evidence has shown that infants can detect statistical regularities in action sequences they observe, but little is known about the neural process that give rise to this ability. In the current experiment, we combined electroencephalography (EEG) with eye-tracking to identify electrophysiological markers that indicate whether 8–11-month-old infants detect violations to learned regularities in action sequences, and to relate these markers to behavioral measures of anticipation during learning. In a learning phase, infants observed an actor performing a sequence featuring two deterministic pairs embedded within an otherwise random sequence. Thus, the first action of each pair was predictive of what would occur next. One of the pairs caused an action-effect, whereas the second did not. In a subsequent test phase, infants observed another sequence that included deviant pairs, violating the previously observed action pairs. Event-related potential (ERP) responses were analyzed and compared between the deviant and the original action pairs. Findings reveal that infants demonstrated a greater Negative central (Nc) ERP response to the deviant actions for the pair that caused the action-effect, which was consistent with their visual anticipations during the learning phase. Findings are discussed in terms of the neural and behavioral processes underlying perception and learning of structured action sequences.