[2603.28066] Synonymix: Unified Group Personas for Generative Simulations

Computer Science > Human-Computer Interaction arXiv:2603.28066 (cs) [Submitted on 30 Mar 2026] Title:Synonymix: Unified Group Personas for Generative Simulations Authors:Huanxing Chen, Aditesh Kumar View a PDF of the paper titled Synonymix: Unified Group Personas for Generative Simulations, by Huanxing Chen and Aditesh Kumar View PDF HTML (experimental) Abstract:Generative agent simulations operate at two scales: individual personas for character interaction, and population models for collective behavior analysis and intervention testing. We propose a third scale: meso-level simulation - interaction with group-level representations that retain grounding in rich individual experience. To enable this, we present Synonymix, a pipeline that constructs a "unigraph" from multiple life story personas via graph-based abstraction and merging, producing a queryable collective representation that can be explored for sensemaking or sampled for synthetic persona generation. Evaluating synthetic agents on General Social Survey items, we demonstrate behavioral signal preservation beyond demographic baselines (p<0.001, r=0.59) with demonstrable privacy guarantee (max source contribution <13%). We invite discussion on interaction modalities enabled by meso-level simulations, and whether "high-fidelity" personas can ever capture the texture of lived experience. Comments: Subjects: Human-Computer Interaction (cs.HC); Artificial Intelligence (cs.AI) Cite as: arXiv:2603.28066 [cs.HC]   (or arX...