通过生理耦合实现自发助人，无需外部奖励或共情。
Prosociality by Coupling, Not Mere Observation: Homeostatic Sharing in an Inspectable Recurrent Artificial Life Agent
- 用生理调节机制耦合自身与伙伴状态，驱动助人行为。
- 在食物共享任务中，耦合强度λ≈0.91时行为从进食转为传递。
- 适合研究自主代理中社会行为的最小生成机制。
人工代理可通过显式社交奖励、硬编码亲社会奖励或直接访问他人状态来实现‘帮助’行为。本文提出一种更狭窄的路径：生理稳态耦合。基于ReCoN-Ipsundrum，引入标量生理调节器和社交耦合通道，同时保持动作选择自导向——规划器仅评估自身预测内部状态，无伴侣福祉奖励。在一步食物共享任务中，精确求解器发现当耦合强度λ⋆≈0.91时，行为由进食转向传递。在多步社交走廊世界中，仅访问伴侣状态但无耦合时行为不变；而耦合后代理会主动取食、携带并传递给伴侣。假性损伤保留助人行为；关闭耦合或打乱伴侣状态则完全消除助人。耦合/负载扫描显示，耦合形成低负荷助人区，但高代谢负荷下无法保证救援。本研究不涉及共情、利他主义、意识或道德地位，仅为最小化人工生命演示：在此控制器中，伴侣状态信息在未接入自我调节前，行为上是惰性的。
原文摘要 · Abstract (English)
Artificial agents can be made to ``help'' through explicit social rewards, hard-coded prosocial bonuses, or direct access to another agent's state. I isolate a narrower route: homeostatic coupling. Building on ReCoN-Ipsundrum, I add a scalar homeostat and a social coupling channel while keeping action selection self-directed: the planner scores only the actor's predicted internal state, with no partner-welfare reward. In a one-step FoodShareToy, an exact solver finds a switch from EAT to PASS at $λ^\star \approx 0.91$ for the default state. In a multi-step SocialCorridorWorld, partner-state access without coupling leaves behavior unchanged, whereas coupled agents fetch, carry, and pass food to the partner. Sham lesions preserve helping; coupling-off and shuffled-partner lesions abolish it. A coupling/load sweep shows that coupling creates a low-load helping regime but does not guarantee rescue under higher metabolic load. This is not a claim about empathy, altruism, consciousness, or moral status. It is a minimal ALife demonstration that, in this controller, partner-state access is behaviorally inert unless partner distress is routed into self-regulation.
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