咖啡因如何影响身心表现：机制、剂量与使用边界
Using Caffeine to Optimize Mental & Physical Performance
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§01咖啡因既是兴奋剂，也是强化剂
节目一开始就把两种常被混为一谈的作用区分开来。咖啡因能够提高警觉、减轻主观困倦，但它也会产生强化作用：当咖啡因与某种食物、饮料、容器或社交场景同时出现时，人们可能逐渐偏爱那个情境。这样的学习性偏好究竟有益还是有害，取决于它强化的具体行为。
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