arXiv Computation and Language By Linkai Peng, Baorian Nuchged, Kaiqi Fu, Yuyang Yao

Full-Duplex Speech Models Take the Floor When Asked, Not When Needed

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Full‑duplex speech models can listen and speak simultaneously, but they struggle to decide when to speak. Experiments with five model families show that being addressed or encountering silence are reliable triggers, whereas cues like false facts or hazards are not. Even when models answer questions, they rarely challenge false claims or warn about danger, revealing a gap in content understanding and intervention decisions.

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