Microsoft Word 2007 ichrie conference Proceedings Final-Final 06-06-07. doc

 
2007 Annual International CHRIE Conference & Exposition 
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<.01), indicating significant difference in high/low age groups. However, this overall cross-group test of the 
structural model does not allow us to investigate invariance in the specific parameter of interest between groups.
Thus, to assess the invariance of a specific path, the more rigorous test was conducted by constraining the particular 
parameter of interest in the nested model to be equal in sequence, and all paths in the baseline were allowed to be 
freely estimated. The chi-square difference test, by comparing the baseline model with the nested model computed 
for 1 degree of freedom, allows invariance to be tested for the specific parameter of interest across two groups.