mediation with multiple groups

[Adar Hoffman]

Hello,

I am relatively new to the group and to lavaan in general...

I am running a mediation using lavaan, but would like to test if the indirect and total effects vary by group (I have 3 groups).

However, when I put the groups = 'group' argument, I don't get estimates for the indirect and total effect...

Can someone have an idea how to get them ?

Thanks !!

Adar.

[Yves Rosseel]

You need to use separate labels for each group, as in

m ~ c(a1,a2,a3)*x
y ~ c(b1,b2,b3)*m

(if you have three groups)

and then you can specify an indirect effect for each group:

ind1 := a1*b1
ind2 := a2*b2
ind3 := a3*b3

Yves.

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[Adar Hoffman]

yeah that works, thank you!

I appreciate your help very much.

A.

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