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            Free, publicly-accessible full text available May 19, 2026
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            Ozcan, Erhan Can; Giammarino, Vittorio; Queeney, James; Paschalidis, Ioannis Ch (, IEEE)Free, publicly-accessible full text available December 16, 2025
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            Sabouni, Ehsan; Sabbir_Ahmad, HM; Giammarino, Vittorio; Cassandras, Christos G; Paschalidis, Ioannis Ch; Li, Wenchao (, IEEE)Free, publicly-accessible full text available December 16, 2025
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            Giammarino, Vittorio; Dunne, Matthew F; Moore, Kylie N; Hasselmo, Michael E; Stern, Chantal E; Paschalidis, Ioannis Ch (, Adaptive Behavior)We develop a framework to learn bio-inspired foraging policies using human data. We conduct an experiment where humans are virtually immersed in an open field foraging environment and are trained to collect the highest amount of rewards. A Markov Decision Process (MDP) framework is introduced to model the human decision dynamics. Then, Imitation Learning (IL) based on maximum likelihood estimation is used to train Neural Networks (NN) that map human decisions to observed states. The results show that passive imitation substantially underperforms humans. We further refine the human-inspired policies via Reinforcement Learning (RL) using the on-policy Proximal Policy Optimization (PPO) algorithm which shows better stability than other algorithms and can steadily improve the policies pre-trained with IL. We show that the combination of IL and RL match human performance and that the artificial agents trained with our approach can quickly adapt to reward distribution shift. We finally show that good performance and robustness to reward distribution shift strongly depend on combining allocentric information with an egocentric representation of the environment.more » « less
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            Giammarino, Vittorio; Paschalidis, Ioannis Ch. (, Proceedings of the 60th IEEE Conference on Decision and Control)
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