Covariance Among latent Variables

newbie_ari — Wed, 07 Jan 2015 10:41:05 GMT

In many of the sem examples, we have noticed that covariances are specified between latent variables.

My Questions are:

1) What's the advantage(s) of specifying covariance in sem model? 2) If there's high covariance within 2 variables, does it affect the direct effect? 3) If there's high covariance within 2 variables, does it affect the indirect effect?
4) Lastly, is there any literature specifically explaining the use of covariance in sem models.

Thanks!

topic Covariance Among latent Variables in Statistical Procedures

Covariance Among latent Variables