Infants Need More Variety - Increased Data Acquisition with Reduced Participant Attrition in Infant ERP Studies.
Infants Need More Variety - Increased Data Acquisition with Reduced Participant Attrition in Infant ERP Studies.
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DOI：
10.3389/fpsyg.2013.00117
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发表时间：
2013
影响因子：
3.8
通讯作者：
Reid VM
中科院分区：
文献类型：
--
作者：
Stets M;Burt M;Reid VM
婴儿ERP研究的特点往往是高流失率，大量试验被排除在统计分析之外。实验条件的数量通常是有限的，以减少测试会话的持续时间，并确保每个条件都能获得合理的试验次数。在这里，我们设计了一项ERP研究，涉及来自之前发表的三项研究的八种情况，并将它们呈现给18名1岁的儿童。我们希望至少在一定程度上复制原始结果。此外，我们对这种新的刺激呈现方法对婴儿注意力的影响很感兴趣。由于需要持续的关注，兴趣可能会降低。或者，刺激的可变性可能会延长注意力，从而获得更多有效的试验。我们的主要发现是，刺激呈现的变异性支持了婴儿超出正常参数的注意力。这一点从获得的无伪影试验数量的显著增加和从大幅降低的流失率中可见一斑。有间隙/无间隙任务的结果被完全复制，而与面孔加工有关的其他任务的结果被部分复制。此外，还发现了原始研究中没有报道的影响。这很可能是由于这些条件之间在信息处理方面的干扰。结果显示，向婴儿呈现不同的刺激可以延长他们的注意力，使他们能够获得比目前婴儿ERP方法至少多四倍的数据。然而，来自单独的子实验的刺激必须在认知和感知上是不同的，否则会出现相关因素之间的污染。
Infant ERP studies often feature high attrition rates with large numbers of trials excluded from statistical analyses. The number of experimental conditions is conventionally limited to reduce the test-sessions’ durations and to ensure that reasonable trial-numbers will be obtained for each condition. Here, we designed an ERP study involving eight conditions originating from three previously published studies and presented them to 18 1-year-olds. We expected to replicate original results at least partly. Additionally, we were interested in the effect this novel method of stimulus presentation would have on infant attention. Due to the requirement for sustained attention, interest may decrease. Alternatively, the stimulus-variability may extend attention, allowing the acquisition of more valid trials. Our main finding was that the variability of the stimulus presentation sustained the infants’ attention beyond normal parameters. This is apparent from the markedly increased number of artifact-free trials obtained and from the substantially decreased attrition rates. Results from a gap-/no gap-task were fully replicated whereas others, related to face-processing, were replicated in part. Additionally, effects that were not reported in the original studies were found. This is most probably due to interference in the information processing between these conditions. The results show that presenting infants with varied stimuli extends their attention, allowing the acquisition of at least four times more data than via current infant ERP methods. However, stimuli from separate sub-experiments must be cognitively and perceptually distinct, otherwise contamination between related factors will occur.
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