@jolly1766 @redbaybound @jimhubbell6177 @RadioFreeTom These studies are most of low quality to the point where you can't really infer correct individual effects, but you absolutely CAN predict a change in R from careful measurement of individual effects. R is just an average across individuals.
@jolly1766@redbaybond@jimhubbell6177@RadioFreeTom这些研究质量很低，以至于你无法真正推断出正确的个体效应，但你完全可以通过仔细测量个体效应来预测R的变化。R只是个人的平均值。