MODEL: per BY Q28@1 Q39; re BY Q6@1 Q16 Q50 Q24; pro BY Q37@1 Q61 Q58 Q30; account BY; account@0; account on re@1 pro; per ON account*;
I tested convergent & discriminant validity by calculating average variation explained (AVE), referring to Fornell and Larcker (1981).
My questions are following:
1) In higher order CFA with formative second order, do I still need to test convergent and discriminant validity? Are there distinguished ways to test the both validity depending on whether a model is reflective or formative?
2) Could you let me know other ways to test the both validity using Mplus? Or could you direct me to helpful sources?
Given that this is a general modeling question and not specifically related to Mplus, you should post it on a general discussion forum like SEMNET.
Tim Powers posted on Wednesday, November 04, 2015 - 10:07 pm
Hello Dr Muthen,
I am trying to conduct a test of discriminant validity between 2 factors using MLR as my estimator, following the Satorra-Bentler chi-square test
My question is: If I run,
Model 1 = 2 factors (3 items each) Model 2 = 1 factor (all 6 items)
(a) Is Model 2 considered a nested model which overcomes the issue of testing parameters on the border of admissible parameter space? (e.g., where the 2 factors have a correlation of 1) (b) If I get a negative SB scaled chi-square difference (I do), what would be the modified parameter constraint added to Model 1 to obtain the ‘c10’ scaling correction factor (i.e., following ‘Mplus Webnotes Number 12, Asparouhov & Muthen, 2013)?