So, it looks like their previous results are not the result of self-selection.
因此，看上去他们早期的结论并不是自我选择下的结论。
Self-selection bias and sampling bias are also discussed at the end of the paper.
与此相关的自选择偏差和抽样偏差问题也在文中进行了讨论。
Once people have been randomly allocated to groups, the counter-argument about self-selection is ruled out.
一旦人们被随机分配到各组，就排除了自我选择的反对理由。
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