In normal times, the network ties that connect students on a college campus are an asset;during a pandemic, they can become a liability Using prepandemic data from Cornell University, Weeden and Cornwell (2020) showed how co-enrollment in classes creates a “small world” network with high clustering, short path lengths, and multiple independent pathways connecting students Using data from the fall of 2020, we assess how the structure of the co-enrollment network changed as Cornell, like many other institutions of higher education, adapted to the pandemic by adopting a hybrid instructional model We find that under hybrid instruction, not only is a much smaller share of students in the face-to-face network, but the paths connecting student pairs in the network lengthened, the share of student pairs connected by three or fewer degrees of separation declined, clustering increased, and a greater share of co-enrollment ties occurred between students in the same field of study The small world became both less connected and more fragmented © 2021 The Authors) This open-access article has been published under a Creative Commons Attribution License, which allows unrestricted use, distribution and reproduction, in any form, as long as the original author and source have been credited All Rights Reserved

中文翻译：

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还是小世界？在 COVID-19 大流行之前和期间的大学课程注册网络

在正常情况下，连接大学校园学生的网络联系是一种资产；在大流行期间，它们可能成为一种负担使用康奈尔大学的大流行前数据，Weeden 和 Cornwell (2020) 展示了课堂上的共同注册如何创造“小世界”网络具有高聚类、短路径长度和连接学生的多个独立路径使用 2020 年秋季的数据，我们评估了随着康奈尔大学和许多其他高等教育机构一样，共同招生网络的结构发生了怎样的变化通过采用混合教学模式应对大流行我们发现在混合教学下，不仅面对面网络中的学生比例要小得多，而且网络中连接学生对的路径也延长了，以三个或更少的分离度连接的学生对的比例下降，集群增加，并且同一学习领域的学生之间发生更大比例的共同注册关系 小世界变得既不连通，也更加分散 © 2021 作者) 此开放获取文章已根据知识共享署名许可发表，该许可允许以任何形式不受限制地使用、分发和复制，只要已注明原始作者和来源。保留所有权利以任何形式分发和复制，只要注明原始作者和来源版权所有以任何形式分发和复制，只要注明原始作者和来源版权所有