[R] Sobel's test for mediation and lme4/nlme

2012-06-06 Thread G B
Hello, Any advice or pointers for implementing Sobel's test for mediation in 2-level model setting? For fitting the hierarchical models, I am using "lme4" but could also revert to "nlme" since it is a relatively simple varying intercept model and the two yield identical estimates. I apologize for t

[R] Sobel's test for mediation and lme4/nlme

2012-06-06 Thread G B
Hello, Any advice or pointers for implementing Sobel's test for mediation in 2-level model setting? For fitting the hierarchical models, I am using "lme4" but could also revert to "nlme" since it is a relatively simple varying intercept model and they yield identical estimates. I apologize for this

[R] Sobel's test for mediation and lme4/nlme

2012-06-06 Thread G B
Hello, Any advice or pointers for implementing Sobel's test for mediation in 2-level model setting? For fitting the hierarchical models, I am using "lme4" but could also revert to "nlme" since it is a relatively simple varying intercept model and they yield identical estimates. I apologize for this