Adapt Flashcards

10 cards. Cooperating with partners you did not train with.

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10 cards

• Concept

  What is partner dependence?

  Concept

  Partner dependence occurs when an agent performs well because it has specialized to the behaviour or conventions of particular training partners.

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• Scenario

  Agent A achieves high reward with B but fails when paired with C. What might this reveal?

  Scenario

  Partner dependence.

  High reward may reflect specialization rather than general cooperation, so the agent fails when paired with a different partner.

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• Distinction

  What is the difference between learning general teamwork and learning one partner's habits?

  Distinction

  General teamwork transfers across different partners and behaviours.

  Learning one partner's habits can produce strong familiar-partner performance but poor generalization.

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• Concept

  Why can training with diverse partners improve partner generalization?

  Concept

  Different partners expose the agent to varied behaviours and conventions.

  This reduces the opportunity to rely on one fixed partner strategy.

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• Concept

  What is agent modelling, and why can it help adaptation?

  Concept

  Agent modelling means inferring useful properties of another agent from its behaviour or interaction history.

  The inferred information can help the agent adjust its own actions.

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• Equation

  What does this represent?

  $${\hat{p}}_t=P(\text{FETCH}\mid h_t)$$

  Equation

  The estimated probability that the partner will choose FETCH, given the interaction history $h_t$.

  $h_t$

  everything observed about the partner so far

  ${\hat{p}}_t$

  the current belief, updated as evidence arrives

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• Intuition

  How does the Observe, Infer, Adjust, Cooperate loop describe adaptation?

  Intuition

  The agent:

  • observes the partner's behaviour;
  • infers something about the partner;
  • adjusts its own strategy;
  • uses that adjustment to cooperate more effectively.

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• Concept

  What is ad hoc teamwork?

  Concept

  Ad hoc teamwork studies how an agent can cooperate with partners without relying on prior coordination with those specific agents.

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• Concept

  What is zero-shot coordination?

  Concept

  Zero-shot coordination evaluates whether agents that were not trained together can cooperate successfully when paired for the first time.

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• Equation

  What do cross-play and the generalization gap help us understand?

  $${\Delta }_{\text{gen}}=J_{\text{familiar}}-J_{\text{unseen}}$$

  Equation

  Cross-play evaluates how policies perform with different partners, especially unfamiliar pairings.

  The gap compares familiar-partner and unseen-partner performance. A larger gap suggests stronger dependence on familiar partners or conventions.

  ${\Delta }_{\text{gen}}$ is a teaching diagnostic used in this resource, not a canonical MARL metric.

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