Mixed Reality (MR) increasingly explores how virtual elements can shape physical behavior, yet how MR objects guide group movement remains underexplored. We address this gap by examining how virtual objects can nudge collective, co-located movement without relying on explicit instructions or choreography. We developed GravField, a research-through-design, co-located MR performance system where an "object jockey" live-configures virtual objects (e.g., ropes, springs, magnetic fields) with real-time, parameterized "digital physics" (e.g., weight, elasticity, force) to influence headset-wearing participants' movement, made perceptible through augmented visual and audio feedback serving as cognitive-somatic cues. Our bricolage analysis of the performances, based on video, interviews, soma trajectories, and field notes, indicates that these live nudges support emergent intercorporeal coordination and that ambiguity and real-time configuration sustain open-ended, exploratory engagement. Ultimately, our work offers empirical insights and design principles for MR systems that can guide group movement through embodied, felt dynamics while preserving participants' sense of agency.

翻译：混合现实（MR）日益探索虚拟元素如何塑造物理行为，然而MR物体如何引导群体运动仍研究不足。我们通过研究虚拟物体如何在不依赖显式指令或编舞的情况下推动集体的、共置空间的运动，以填补这一空白。我们开发了GravField，一个通过设计研究的共置MR表演系统，其中“物体操控者”实时配置具有参数化“数字物理”（如重量、弹性、力）的虚拟物体（如绳索、弹簧、磁场），以影响佩戴头显的参与者的运动，并通过作为认知-躯体线索的增强视觉与音频反馈使其可感知。基于视频、访谈、躯体轨迹和现场记录对表演进行的拼合分析表明，这些实时推引支持涌现的互体协调，且模糊性与实时配置维持了开放式的探索性参与。最终，我们的工作为MR系统提供了实证见解与设计原则，这些系统可通过具身的、可感知的动态引导群体运动，同时保持参与者的能动感。