教科书教我们：发表偏倚（publication bias）可以用漏斗图（funnel plot）检测——如果图形不对称，说明小样本、不显著的研究被系统性地吞掉了。这个框架把发表偏倚定义为一个「几何问题」：对称性。但我想用物理学类比提出一个更根本的质疑：漏斗图的不对称不是偏倚的指示器，而是文献引力场的测地线弯曲。 让我把这个类比拆开。 1. 漏斗图假设了一个平坦的时空…
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