Taehyun Cho Headshot

Taehyun Cho

Vector Distinguished Postdoctoral Fellow

My research focuses on sequential decision-making under uncertainty, particularly in the context of human feedback. I have extensively studied distributional reinforcement learning (DistRL), reinforcement learning from human feedback (RLHF), and regret analysis, aiming to bridge theory and practice.

My long-term goal is to build human-aligned, socially aware agents — systems that reason about people, navigate the dynamics of human interaction, and act on their preferences, values, and decisions. I draw inspiration from how humans make decisions. By seeking to understand the cognitive mechanisms underlying human choice and mathematically modeling the structure that governs interaction, I aim to develop both theoretical insights and practical algorithms for robust decision-making under uncertainty.

Research Interests

  • Reinforcement Learning
  • Sequential Decision Making under Uncertainty
  • Socially-aware, Human Alignment

Highlights

  • (ICML 2026 Spotlight, Top 2.2%) A Regret Minimization Framework on Preference Learning in Large Language Models
  • (ICML 2025 Spotlight, Top 2.6%) Policy-labeled Preference Learning: Is Preference Enough for RLHF?
  • (ICML 2025) Bellman Unbiasedness: Toward Provably Efficient Distributional Reinforcement Learning with General Value Function Approximation
  • (NeurIPS 2023) Pitfall of Optimism: Distributional Reinforcement Learning by Randomizing Risk Criterion