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Decision-Driven Phase Transitions in Biological Collectives via Interpretable Multi-Agent IRL with Closed-Loop VR and Robotic Platform Validation

Objective

CRIT-IRL will uncover the individual decision rules that drive phase transitions in biological collectives and will validate these mechanisms causally using closed-loop virtual reality (VR) and bio-hybrid robotics. The project addresses a key gap: existing models reproduce global patterns but rarely capture interpretable, context-dependent decisions—or show how such decisions generate critical transitions at the group level.

Objective 1. From trajectories to decision rules: infer interpretable, multi-objective policies from high-resolution multi-animal data via multi-agent inverse reinforcement learning (IRL) with graph-based interaction modelling; deliver a validated model, curated datasets and open code.
Objective 2. From decision rules to criticality: construct phase diagrams linking decision parameters to collective regimes; derive early-warning diagnostics (variance, recovery time, influential-agent scores) and identify critical individuals/time windows precipitating transitions.
Objective 3. Closed-loop causal validation: embed the learned policy in immersive VR with live fish and deploy it on aquatic robots to steer groups across phase boundaries, benchmarking against rule-based baselines and ablations.

Methodological innovations. Interpretable MA-IRL with constrained reward bases and heterogeneity; multi-scale validation (micro kinematics to macro order parameters); physics-informed mechanism mapping; embodied, counterfactual tests in VR/robotics. Open science: preregistered analyses, FAIR data, and reusable protocols/software.

CRIT-IRL yields mechanistic insight into decision-driven criticality, principled controllers for bio-hybrid swarms, and transferable diagnostics for other complex systems (e.g. ecological monitoring, distributed AI). The fellowship provides integrated training across behavioural biology, machine learning, complex-systems physics, and VR/robotics, leveraging state-of-the-art facilities to maximise scientific and career impact

Fields of science (EuroSciVoc)

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Keywords

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Topic(s)

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) HORIZON-MSCA-2025-PF

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Coordinator

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 202 125,12
Address
HOFGARTENSTRASSE 8
80539 MUNCHEN
Germany

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Region
Bayern Oberbayern München, Kreisfreie Stadt
Activity type
Research Organisations
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Total cost

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