PDF(Pubmed)
Abstract：
Massive studies have explored biological motion (BM) crowds processing for their remarkable social significance, primarily focused on uniformly distributed ones. However, real-world BM crowds often exhibit hierarchical structures rather than uniform arrangements. How such structured BM crowds are processed remains a subject of inquiry. This study investigates the representation of structured BM crowds in working memory (WM), recognizing the pivotal role WM plays in our social interactions involving BM. We propose the group-based ensemble hypothesis and test it through a member identification task. Participants were required to discern whether a presented BM belonged to a prior memory display of eight BM, each with distinct walking directions. Drawing on prominent Gestalt principles as organizational cues, we constructed structured groups within BM crowds by applying proximity and similarity cues in Experiments 1 and 2, respectively. In Experiment 3, we deliberately weakened the visibility of stimuli structures by increasing the similarity between subsets, probing the robustness of results. Consistently, our findings indicate that BM aligned with the mean direction of the subsets was more likely to be recognized as part of the memory stimuli. This suggests that WM inherently organizes structured BM crowds into separate ensembles based on organizational cues. In essence, our results illuminate the simultaneous operation of grouping and ensemble encoding mechanisms for BM crowds within WM.
摘要：
大量研究探索了生物运动（BM）人群的显着社会意义，主要集中在均匀分布的。然而,现实世界的BM人群通常表现出分层结构，而不是统一的安排。如何处理这种结构化的BM人群仍然是一个问题。这项研究调查了结构化BM人群在工作记忆(WM)中的表现，认识到WM在我们涉及BM的社交互动中的关键作用。我们提出了基于群体的集成假设，并通过成员识别任务对其进行了测试。要求参与者辨别所呈现的BM是否属于八个BM的先前记忆显示，每个人都有不同的行走方向。借鉴突出的格式塔原则作为组织线索，我们通过在实验1和2中分别应用接近度和相似性线索，在BM人群中构建了结构化组。在实验3中，我们通过增加子集之间的相似性来故意削弱刺激结构的可见性，探索结果的稳健性。始终如一，我们的发现表明,与子集的平均方向一致的BM更有可能被认为是记忆刺激的一部分.这表明WM固有地根据组织线索将结构化的BM人群组织成单独的集合。实质上,我们的结果阐明了WM内BM人群的分组和集成编码机制的同时操作。
