标题： “弱关系的力量”在病毒传播渠道中有所不同 显示英文标题

标题： "The Strength of Weak Ties" Varies Across Viral Channels

摘要： 通过社交网络传播新信息对于打破回音室并促进创新至关重要。 我们的研究考察了两种主要的病毒式传播渠道，即直接消息（DM）和广播（BC），它们如何影响在社交网络中传播新信息时众所周知的“弱连接的力量”。 我们进行了一项大规模的实证分析，研究了在一个主要社交媒体平台上500,000名用户在两个月内的分享行为。 我们的结果表明，与BC相比，DM在传输新信息方面具有更大的能力，尽管DM通常涉及更强的联系。 此外，“弱连接的力量”仅在BC中显现，在DM中则不明显，因为在DM中较弱的联系并不会显著传播更多新信息。 我们的机制分析表明，发送者和接收者根据联系强度进行的内容选择，导致了这两种渠道之间的观察差异。 这些发现扩展了我们对当代弱连接理论的理解以及我们在社交网络中传播新信息的知识。 显示英文摘要

摘要： The diffusion of novel information through social networks is essential for dismantling echo chambers and promoting innovation. Our study examines how two major types of viral channels, specifically Direct Messaging (DM) and Broadcasting (BC), impact the well-known "strength of weak ties" in disseminating novel information across social networks. We conducted a large-scale empirical analysis, examining the sharing behavior of 500,000 users over a two-month period on a major social media platform. Our results suggest a greater capacity for DM to transmit novel information compared to BC, although DM typically involves stronger ties. Furthermore, the "strength of weak ties" is only evident in BC, not in DM where weaker ties do not transmit significantly more novel information. Our mechanism analysis indicates that the content selection by both senders and recipients, contingent on tie strength, contributes to the observed differences between these two channels. These findings expand both our understanding of contemporary weak tie theory and our knowledge of how to disseminate novel information in social networks.