When to Think and When to Look: Uncertainty-Guided Lookback. - Jing Bi 002; Filippos Bellos; Junjia Guo; Yayuan Li; Chao Huang 033; Yolo Yunlong Tang; Luchuan Song; Susan Liang; Zhongfei Mark Zhang; Jason J. Corso; Chenliang Xu (CoRR, 2025)