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Jessica Hullman

Northwestern University

Papers on Lattice

1

Total citations

0

Topics

3

h-index

2

Research focus

Data Curation & Synthetic Data (1)RLHF & Preference Learning (1)Training Efficiency & Optimization (1)

Frequent co-authors

Dong Shu (1)Denghui Zhang (1)

Papers (1)

Apr 2, 2026

Apr 2, 2026·also Stevens

Learning from the Right Rollouts: Data Attribution for PPO-based LLM Post-Training

Noisy rollouts are dragging down your PPO fine-tuning: selectively training on high-influence trajectories boosts performance and cuts training time.

Dong Shu, Denghui Zhang, Jessica Hullman

Data Curation & Synthetic Data RLHF & Preference Learning Training Efficiency & Optimization