Table 3.

The definitions of all natural path-specific effects when there are two mediators that are not causally ordered. There are four versions (one level-0, two level-1, and one level-2) of each of the three effects (direct, indirect through , and indirect through ; note that there is no effect through both and when the mediators are not causally ordered)

Path	Level	Effect	Definition
	0
Direct	1
(through )	1
	2
	0
Indirect	1
through	1
	2
	0
Indirect	1
through	1
	2