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arXiv · 2607.22658

StanceBench: A Benchmark for Audio LLM-Based Interpersonal Stance Evaluation from Speech

Yuzhe Wang·Thomas Thebaud·Jennifer Hu·Jesús Villalba-Lopez·Venkatesh Ravichandran·Georgi Tinchev·Najim Dehak·Laureano Moro-Velázquez
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Abstract

Speech-to-speech dialogue models increasingly depend on prosody and interactional nuance to convey social intent, yet benchmarks for these cues remain limited. We introduce StanceBench, a benchmark for measuring interpersonal stance in conversational speech and evaluating audio-capable LLMs as automated judges. Using the Seamless Interaction corpus, StanceBench (1) specifies 9 stance dimensions via role-prompt poles, (2) standardizes single-speaker and interaction-based evaluations, and (3) reports LLM-as-a-judge robustness, bias, and stance inference. Across evaluated stances, empathy and politeness are the easiest. Warmth and assertiveness are moderately separable with positivity skew/asymmetry. Honesty is the hardest and shows high prompt order bias, consistent with needing cross-turn evidence. Attentiveness is separable but aligns weakly with humans. Interaction stances are more context-sensitive, with threshold gaps and high variance, especially conflict regulation.

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Yuzhe Wang, Thomas Thebaud, Jennifer Hu, Jesús Villalba-Lopez, Venkatesh Ravichandran, Georgi Tinchev, Najim Dehak, Laureano Moro-Velázquez. 2026-06-27. StanceBench: A Benchmark for Audio LLM-Based Interpersonal Stance Evaluation from Speech. https://arxiv.org/abs/2607.22658

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