Re: st: Calculation of total effects and the significance test of indirect effect

[Richard Williams <Richard.A.Williams.5@nd.edu>]

At 02:05 AM 9/30/2004 -0500, Michael Cha wrote:

> Then, is there anyway to test the significance of indirect effect of path 
> coefficients a*b (which are multiplied indirect effects of the path from X 
> to Z(a) and Z to Y(b)?
You may wish to look at

Asymptotic Confidence Intervals for Indirect Effects in Structural Equation 
Models
Michael E. Sobel
Sociological Methodology, Vol. 13. (1982), pp. 290-312.

Some New Results on Indirect Effects and Their Standard Errors in 
Covariance Structure Models
Michael E. Sobel
Sociological Methodology, Vol. 16. (1986), pp. 159-186.

Both are available on Jstor if you have access to it.


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