Modeling and Benchmarking Spoken Dialogue Rewards with Modality and Colloquialness. - Jingyu Lu 001; Yuhan Wang; Fan Zhuo; Xize Cheng; Changhao Pan; Xueyi Pu; Yifu Chen; Chenyuhao Wen; Tianle Liang; Zhou Zhao 001 (CoRR, 2026)