The descriptive statistics of the measured variables are presented in Table 1. Before SEM, in the review of the multivariate normality, the skewness and kurtosis for each measured variable was found to be 0.03-1.62 and 0.17-2.67 respectively. As both absolute values were less than 3, the assumption of multivariate normality was met . Moreover, multicollinearity between measured variables was examined by Pearson correlation coefficients. If a correlation coefficient is greater than .70, the variables might have an interaction . However, in this study, the correlation coefficients of the variables were less than .70 (range: .15e.65) and the variance inflation factors of the variables were less than 10 (range: 1.09e1.86), which indicated that the multicollinearity between measured variables was not problematic.