论文标题
单个试验ERP振幅揭示了获得个别参与者的新面孔表示的时间过程
Single trial ERP amplitudes reveal the time course of acquiring representations of novel faces in individual participants
论文作者
论文摘要
面部个性化的神经相关性 - 新面孔的记忆表示的获取 - 仅细细节研究并无视学习者之间的个体差异。在他们的开创性研究（Tanaka，Curran，Porterfield和Collins，2006年）中，需要在70次试验中鉴定出特定的小说面孔，发现ERP中的N250成分从实验的第一个到下半年变得更加负面，在那里它达到了与众所周知的面孔相似的幅度。当我们使用原始的试验拆分时，我们无法在研究中直接复制这一发现。但是，当我们应用了不同的试验拆分时，我们观察到N250振幅的变化非常相似。然后，我们基于置换测试开发并应用了一种新的两步探索性验证性非参数方法，以根据单审判N250振幅确定个体参与者的面部个体时间过程。我们表明，在目标面的多个演示中，N250幅度急剧上升的假设随后是高原，在适合大多数参与者的线性趋势方面会产生合理的结果。参与者之间从初始收购到高原阶段的过渡点差异很大，并且当目标面部识别表现更好时，往往会更早。因此，可以通过早期，快速获取的双相过程来解释面部个性化，然后是较慢的渐近巩固或维护阶段。当前的方法可能会有效地应用于面部个体化及其神经相关性的进一步研究
The neural correlates of face individuation - the acquisition of memory representations for novel faces - have been studied only in coarse detail and disregarding individual differences between learners. In their seminal study, (Tanaka, Curran, Porterfield, & Collins, 2006) required the identification of a particular novel face across 70 trials and found that the N250 component in the ERP became more negative from the first to the second half of the experiment, where it reached a similar amplitude as a well-known face. We were unable to directly replicate this finding in our study when we used the original split of trials. However, when we applied a different split of trials we observed very similar changes in N250 amplitude. Then, we developed and applied a new two-step explorative-confirmative non-parametric method based on permutation testing to determine the time course of face individuation in individual participants based on single-trial N250 amplitudes. We show that the assumption of a steep initial increase of N250 amplitude across multiple presentations of the target face, followed by a plateau, yields plausible results in fitting linear trends for most participants. The transition point from initial acquisition to the plateau phase differed strongly between participants and tended to be earlier when performance in target face recognition was better. Hence, face individuation may be accounted for by a biphasic process of early, fast acquisition, followed by a slower, asymptotic consolidation or maintenance phase. The current approach might be fruitfully applied to further investigations into face individuation and their neural correlates
