Popova Tsvetomila, Wiese Holger
Durham University, United Kingdom.
Durham University, United Kingdom.
Biol Psychol. 2022 Apr;170:108312. doi: 10.1016/j.biopsycho.2022.108312. Epub 2022 Mar 12.
How long does it take to truly know a person? To answer this question, we investigated how event-related brain potential (ERP) correlates of facial familiarity (N250) and the integration of identity-specific knowledge (Sustained Familiarity Effect, SFE) develop over time. Sixty undergraduate students from three year groups were tested with images of a university friend (with two, 14, and 26 months of familiarity for Year 1, Year 2, and Year 3 students), a highly familiar friend from home, and an unfamiliar identity. While clear ERP familiarity effects for home friends were observed in all groups, university friends yielded a clear N250 effect but only a small SFE in Year 1. Importantly, both effects significantly increased for university friends from Year 1 to Year 2, but not afterwards. Our results demonstrate that neural representations of visual familiarity and identity-specific knowledge build up over time and are fully developed by 14 months of familiarity.
真正了解一个人需要多长时间？为了回答这个问题，我们研究了与面部熟悉度相关的事件相关脑电位（ERP）（N250）以及特定身份知识的整合（持续熟悉效应，SFE）是如何随时间发展的。对来自三个年级的60名本科生进行了测试，测试图片包括一位大学朋友（一年级、二年级和三年级学生分别对其有2个月、14个月和26个月的熟悉时间）、一位来自家乡的非常熟悉的朋友以及一个陌生的面孔。虽然在所有组中都观察到了对家乡朋友清晰的ERP熟悉效应，但大学朋友在一年级时产生了清晰的N250效应，但只有很小的SFE。重要的是，从一年级到二年级，大学朋友的这两种效应都显著增加，但之后没有增加。我们的结果表明，视觉熟悉度和特定身份知识的神经表征会随着时间的推移而建立，并在熟悉14个月时完全形成。
