For measurement assessment, different measurement models were compared following the suggestions of various scholars (Podsakoff and Organ 1986; Cunningham 2006). Besides the aforementioned goodness of fit indices, χ2 values served as a means to compare models. A χ2 value lower than the χ2 value of the basic model indicates better fit with the data. The chi-square difference ( χ2) test that examines if the chi-square difference of two models is significant (Loehlin 1992) provides an additional check.