

(1) Interpreting Rsquare (2) control... 

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Gavin Elder posted on Saturday, November 13, 2010  1:01 pm



Hi there, I have two questions regarding a path model we are getting set to finish up. The model consists of 1 DV, 1 IV, and 4 mediators (through three indirect paths). The first question regards the Rsquare output provided. The output provides the rsquare for all of the variables in the model which have other variable(s) predicitng them (i.e., all except the DV). (1) is it correct to interpret the rsquare coefficient as .176 = 17.6% of the variance explained in __ variable using this model? and (2) we are interested in the rsquare in the IV accounted for by each of the explaining variables (IV, and each Mediator)  is this possible to obtain? or can we only see the total amount explained by the model itself? My second question regards the use of control variables (i.e., does our model account for the DV, above and beyond the variance explained by a certain set of variables  e.g., controlling for the effect of gender on blood pressure). In this model, would I include a single path "dv ON control"? or, would I include the control variable in each of the paths predicting the outcome: "dv ON control iv"? Your help is greatly appreciated! Thanks 


(1) Yes. (2) I think you meant to say DV and not IV here  no, you can't divide up the variance explained because the explaining variables are correlated. Each of the paths. 

Gavin Elder posted on Sunday, November 14, 2010  11:31 am



Dr. Muthen, thank you much! 

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