Collective memory -- community members' interconnected memories and impressions of the group -- is essential to the community's culture and identity. Its development requires members' continuous participatory contribution and sensemaking. However, existing works mainly adopt a holistic sociological perspective to analyze well-developed collective memory, less focusing on member-level conceptualization of this possession or what the co-contribution practices can be. Therefore, this work alternatively adopts the latter perspective and probes such interpretative and interactional patterns with two mobile systems. With one being a locative narrative and exploration system condensed from existing literature's design frameworks, and the other being a conventional online forum representing current practices, they served as the anchors of observation for our two-week, mixed-methods field study (n=38) on a university campus. A core debate we have identified was to retrospectively contemplate or document the presence as a history for the future. This also subsequently impacted the narrative focuses, expectations of collective memory constituents, and the ways participants seek inspiration from the group. We further extracted design considerations that could better embrace the diverse conceptualizations of collective memory and bond different community members together. Lastly, revisiting and reflecting on our design, we provided extra insights on designing devoted locative narrative experiences for community-driven UGC platforms.

翻译：集体记忆——社群成员对群体相互关联的记忆与印象——对社群的文化与身份认同至关重要。其发展需要成员持续的参与性贡献和意义建构。然而，现有研究主要采用整体性社会学视角分析已成熟的集体记忆，较少关注成员层面对这一所属物的概念化，或共建实践可能的形式。因此，本工作另辟蹊径，采用后一种视角，借助两款移动系统探究此类阐释与互动模式。其中一款是基于现有文献设计框架凝练而成的定位叙事与探索系统，另一款则是代表当前实践的传统在线论坛。两者作为我们为期两周、在校园开展的混合方法田野研究（n=38）的观测锚点。我们识别出的一个核心争论在于：是回溯性反思当下，还是将当下记录为面向未来的历史。这一分歧还进一步影响了叙事重点、对集体记忆构成要素的期望，以及参与者从群体中寻找灵感的方式。我们进一步提炼了设计考量，以更好地包容集体记忆的多样概念化，并凝聚不同社群成员。最后，通过重新审视与反思我们的设计，我们为面向社群驱动的用户生成内容平台设计专注的定位叙事体验提供了额外洞见。