I did a survey based on the UTAUT model / theory with standard questions used. The N was 150. I am trying to validate the model for my survey with structural equation modeling (via the AMOS software). But I have heard that before testing the model fit, "it is absolutely necessary to establish convergent and discriminant validity, as well as reliability, when doing a CFA" (confirmatory factor analysis).

Doing CFA, I found out that factor loadings are OK (using AMOS, loadings > 0,7).

I did CR for reliability testing, everything OK – over 0,7. But (not like other published papers) I have problems with convergent and discriminant validity (note results below).

Is there some way to deal with this or do I have to restate the questions and repeat the survey? (I think doing exploratory factor analysis is not logical if so many others have proven the theory works, so does that mean something must be wrong with my data?)

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#### Best Answer

Basically you are doomed. But you may llok at Zaid and Bartea, 2011 to calculate discriminant validity after Segars, 1997. It involves calculating fit coefficients with two constructs at a time twice having the first one correlated and the second uncorrelated between constructs. Comparing the fit measures between these two methods if they are significantly different as per CMIN criteria for 1 degree of freedom, then discriminant validity is said to exist.

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