一蓑云 发表于 2021-4-26 09:46 
检验结果,如果c为正不显著,按照温忠麟(2014)应该是按遮掩效应立论。继续检验的结果,a,b均为正且显著, ...
可以看看这篇文献Xinshu Zhao, John G. Lynch & Qimei Chen (2010) Reconsidering Baron and Kenny: Myths and Truths about Mediation Analysis里面有介绍几种中介效应:
1. Complementary mediation: Mediated effect (a * b)and direct effect (c) both exist and point at the same
direction.
2. Competitive mediation: Mediated effect (a * b) and direct effect (c) both exist and point in opposite directions.
3. Indirect-only mediation: Mediated effect (a * b) exists, but no direct effect.
4. Direct-only nonmediation: Direct effect (c) exists, but no indirect effect.
5. No-effect nonmediation: Neither direct effect nor indirect effect exists.